标签：
限定查询与排序显示
限定查询指的是在数据查询时设置一系列的过滤条件，只有满足指定的条件后才可以进行显示
在SQL标准中限定查询的语法如下：
select [distinct] *|列名称 [as] [列别名],列名称 [as] [列别名], … from 表名称 [表别名] [where 条件(s)]
1查看emp表中的数据量
Oracle
SQL> select count(*) from emp;
COUNT(*)
----------
14
PPAS
scott=# select count(*) from emp;
count
-------
14
(1 row)
2 统计出基本工资高于1500元的全部雇员信息
Oracle
SQL> select * from emp where sal>1500;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7499 ALLEN SALESMAN 7698 20-FEB-81
1600 300 30
7566 JONES MANAGER 7839 02-APR-81
2975 20
7698 BLAKE MANAGER 7839 01-MAY-81
2850 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
7839 KING PRESIDENT 17-NOV-81
5000 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7902 FORD ANALYST 7566 03-DEC-81
3000 20
7 rows selected.
PPAS
scott=# select * from emp where sal>1500;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+-------+-----------+------+--------------------+---------+--------+--------
7499 | ALLEN | SALESMAN | 7698 | 20-FEB-81 00:00:00 | 1600.00 | 300.00 | 30
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7698 | BLAKE | MANAGER | 7839 | 01-MAY-81 00:00:00 | 2850.00 | | 30
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
7839 | KING | PRESIDENT | | 17-NOV-81 00:00:00 | 5000.00 | | 10
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
(7 rows)
3查询出所有基本工资小于等于2000元的全部雇员信息
Oracle
SQL> select * from emp where sal<=2000;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80
800 20
7499 ALLEN SALESMAN 7698 20-FEB-81
1600 300 30
7521 WARD SALESMAN 7698 22-FEB-81
1250 500 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7654 MARTIN SALESMAN 7698 28-SEP-81
1250 1400 30
7844 TURNER SALESMAN 7698 08-SEP-81
1500 0 30
7876 ADAMS CLERK 7788 23-MAY-87
1100 20
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7900 JAMES CLERK 7698 03-DEC-81
950 30
7934 MILLER CLERK 7782 23-JAN-82
1300 10
8 rows selected.
PPAS
scott=# select * from emp where sal<=2000;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+----------+------+--------------------+---------+---------+--------
7369 | SMITH | CLERK | 7902 | 17-DEC-80 00:00:00 | 800.00 | | 20
7499 | ALLEN | SALESMAN | 7698 | 20-FEB-81 00:00:00 | 1600.00 | 300.00 | 30
7521 | WARD | SALESMAN | 7698 | 22-FEB-81 00:00:00 | 1250.00 | 500.00 | 30
7654 | MARTIN | SALESMAN | 7698 | 28-SEP-81 00:00:00 | 1250.00 | 1400.00 | 30
7844 | TURNER | SALESMAN | 7698 | 08-SEP-81 00:00:00 | 1500.00 | 0.00 | 30
7876 | ADAMS | CLERK | 7788 | 23-MAY-87 00:00:00 | 1100.00 | | 20
7900 | JAMES | CLERK | 7698 | 03-DEC-81 00:00:00 | 950.00 | | 30
7934 | MILLER | CLERK | 7782 | 23-JAN-82 00:00:00 | 1300.00 | | 10
(8 rows)
4根据之前的查询结果发现SMITH的工资 最低，所以现在希望可以取得SMITH的详细资料
Oracle
SQL> select * from emp where ename=‘SMITH‘;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80
800 20
PPAS
scott=# select * from emp where ename=‘SMITH‘;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+-------+-------+------+--------------------+--------+------+--------
7369 | SMITH | CLERK | 7902 | 17-DEC-80 00:00:00 | 800.00 | | 20
(1 row)
5查询出所有业务员（CLERK）的雇员信息
Oracle
SQL> select * from emp where job=‘CLERK‘;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80
800 20
7876 ADAMS CLERK 7788 23-MAY-87
1100 20
7900 JAMES CLERK 7698 03-DEC-81
950 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7934 MILLER CLERK 7782 23-JAN-82
1300 10
PPAS
scott=# select * from emp where job=‘CLERK‘;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+-------+------+--------------------+---------+------+--------
7369 | SMITH | CLERK | 7902 | 17-DEC-80 00:00:00 | 800.00 | | 20
7876 | ADAMS | CLERK | 7788 | 23-MAY-87 00:00:00 | 1100.00 | | 20
7900 | JAMES | CLERK | 7698 | 03-DEC-81 00:00:00 | 950.00 | | 30
7934 | MILLER | CLERK | 7782 | 23-JAN-82 00:00:00 | 1300.00 | | 10
(4 rows)
6为了和其他职位的雇员对比，现在决定查询所有不是业务员的雇员信息
Oracle
SQL> select * from emp where job<>‘CLERK‘;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7499 ALLEN SALESMAN 7698 20-FEB-81
1600 300 30
7521 WARD SALESMAN 7698 22-FEB-81
1250 500 30
7566 JONES MANAGER 7839 02-APR-81
2975 20
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7654 MARTIN SALESMAN 7698 28-SEP-81
1250 1400 30
7698 BLAKE MANAGER 7839 01-MAY-81
2850 30
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
7839 KING PRESIDENT 17-NOV-81
5000 10
7844 TURNER SALESMAN 7698 08-SEP-81
1500 0 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7902 FORD ANALYST 7566 03-DEC-81
3000 20
10 rows selected.
SQL> select * from emp where job!=‘CLERK‘;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7499 ALLEN SALESMAN 7698 20-FEB-81
1600 300 30
7521 WARD SALESMAN 7698 22-FEB-81
1250 500 30
7566 JONES MANAGER 7839 02-APR-81
2975 20
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7654 MARTIN SALESMAN 7698 28-SEP-81
1250 1400 30
7698 BLAKE MANAGER 7839 01-MAY-81
2850 30
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
7839 KING PRESIDENT 17-NOV-81
5000 10
7844 TURNER SALESMAN 7698 08-SEP-81
1500 0 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7902 FORD ANALYST 7566 03-DEC-81
3000 20
10 rows selected.
PPAS
scott=# select * from emp where job<>‘CLERK‘;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+-----------+------+--------------------+---------+---------+--------
7499 | ALLEN | SALESMAN | 7698 | 20-FEB-81 00:00:00 | 1600.00 | 300.00 | 30
7521 | WARD | SALESMAN | 7698 | 22-FEB-81 00:00:00 | 1250.00 | 500.00 | 30
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7654 | MARTIN | SALESMAN | 7698 | 28-SEP-81 00:00:00 | 1250.00 | 1400.00 | 30
7698 | BLAKE | MANAGER | 7839 | 01-MAY-81 00:00:00 | 2850.00 | | 30
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
7839 | KING | PRESIDENT | | 17-NOV-81 00:00:00 | 5000.00 | | 10
7844 | TURNER | SALESMAN | 7698 | 08-SEP-81 00:00:00 | 1500.00 | 0.00 | 30
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
(10 rows)
scott=# select * from emp where job!=‘CLERK‘;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+-----------+------+--------------------+---------+---------+--------
7499 | ALLEN | SALESMAN | 7698 | 20-FEB-81 00:00:00 | 1600.00 | 300.00 | 30
7521 | WARD | SALESMAN | 7698 | 22-FEB-81 00:00:00 | 1250.00 | 500.00 | 30
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7654 | MARTIN | SALESMAN | 7698 | 28-SEP-81 00:00:00 | 1250.00 | 1400.00 | 30
7698 | BLAKE | MANAGER | 7839 | 01-MAY-81 00:00:00 | 2850.00 | | 30
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
7839 | KING | PRESIDENT | | 17-NOV-81 00:00:00 | 5000.00 | | 10
7844 | TURNER | SALESMAN | 7698 | 08-SEP-81 00:00:00 | 1500.00 | 0.00 | 30
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
(10 rows)
7查询出工资范围在1500~3000（包含1500和3000）元的全部雇员信息
Oracle
SQL> select * from emp where sal>=1500 and sal<=3000;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7499 ALLEN SALESMAN 7698 20-FEB-81
1600 300 30
7566 JONES MANAGER 7839 02-APR-81
2975 20
7698 BLAKE MANAGER 7839 01-MAY-81
2850 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
7844 TURNER SALESMAN 7698 08-SEP-81
1500 0 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7902 FORD ANALYST 7566 03-DEC-81
3000 20
7 rows selected.
PPAS
scott=# select * from emp where sal>=1500 and sal<=3000;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+----------+------+--------------------+---------+--------+--------
7499 | ALLEN | SALESMAN | 7698 | 20-FEB-81 00:00:00 | 1600.00 | 300.00 | 30
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7698 | BLAKE | MANAGER | 7839 | 01-MAY-81 00:00:00 | 2850.00 | | 30
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
7844 | TURNER | SALESMAN | 7698 | 08-SEP-81 00:00:00 | 1500.00 | 0.00 | 30
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
(7 rows)
8查询职位是销售人员，并且基本工资高于1200元的所有雇员信息
Oracle
SQL> select * from emp where job=‘SALESMAN‘ and sal>1200;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7499 ALLEN SALESMAN 7698 20-FEB-81
1600 300 30
7521 WARD SALESMAN 7698 22-FEB-81
1250 500 30
7654 MARTIN SALESMAN 7698 28-SEP-81
1250 1400 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7844 TURNER SALESMAN 7698 08-SEP-81
1500 0 30
PPAS
scott=# select * from emp where job=‘SALESMAN‘ and sal>1200;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+----------+------+--------------------+---------+---------+--------
7499 | ALLEN | SALESMAN | 7698 | 20-FEB-81 00:00:00 | 1600.00 | 300.00 | 30
7521 | WARD | SALESMAN | 7698 | 22-FEB-81 00:00:00 | 1250.00 | 500.00 | 30
7654 | MARTIN | SALESMAN | 7698 | 28-SEP-81 00:00:00 | 1250.00 | 1400.00 | 30
7844 | TURNER | SALESMAN | 7698 | 08-SEP-81 00:00:00 | 1500.00 | 0.00 | 30
(4 rows)
9要求查询出10部门中的经理或者20部门中的业务员的信息
Oralce
SQL> select * from emp
2 where (deptno=10 and job=‘MANAGER‘) or (deptno=20 and job=‘CLERK‘);
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80
800 20
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
7876 ADAMS CLERK 7788 23-MAY-87
1100 20
PPAS
scott=# select * from emp
scott-# where (deptno=10 and job=‘MANAGER‘) or (deptno=20 and job=‘CLERK‘);
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+-------+---------+------+--------------------+---------+------+--------
7369 | SMITH | CLERK | 7902 | 17-DEC-80 00:00:00 | 800.00 | | 20
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7876 | ADAMS | CLERK | 7788 | 23-MAY-87 00:00:00 | 1100.00 | | 20
(3 rows)
10查询不是业务员且基本工资大于2000元的全部雇员信息
Oracle
SQL> select * from emp
2 where job !=‘CLERK‘ and sal>2000;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7566 JONES MANAGER 7839 02-APR-81
2975 20
7698 BLAKE MANAGER 7839 01-MAY-81
2850 30
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
7839 KING PRESIDENT 17-NOV-81
5000 10
7902 FORD ANALYST 7566 03-DEC-81
3000 20
6 rows selected.
SQL> select * from emp
2 where job <>‘CLERK‘ and sal>2000;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7566 JONES MANAGER 7839 02-APR-81
2975 20
7698 BLAKE MANAGER 7839 01-MAY-81
2850 30
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
7839 KING PRESIDENT 17-NOV-81
5000 10
7902 FORD ANALYST 7566 03-DEC-81
3000 20
6 rows selected.
SQL> select * from emp
2 where not(job=‘CLERK‘ or sal<=2000);
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7566 JONES MANAGER 7839 02-APR-81
2975 20
7698 BLAKE MANAGER 7839 01-MAY-81
2850 30
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
7839 KING PRESIDENT 17-NOV-81
5000 10
7902 FORD ANALYST 7566 03-DEC-81
3000 20
6 rows selected.
PPAS
scott=# select * from emp
scott-# where job !=‘CLERK‘ and sal>2000;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+-------+-----------+------+--------------------+---------+------+--------
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7698 | BLAKE | MANAGER | 7839 | 01-MAY-81 00:00:00 | 2850.00 | | 30
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
7839 | KING | PRESIDENT | | 17-NOV-81 00:00:00 | 5000.00 | | 10
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
(6 rows)
scott=# select * from emp
scott-# where job <>‘CLERK‘ and sal>2000;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+-------+-----------+------+--------------------+---------+------+--------
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7698 | BLAKE | MANAGER | 7839 | 01-MAY-81 00:00:00 | 2850.00 | | 30
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
7839 | KING | PRESIDENT | | 17-NOV-81 00:00:00 | 5000.00 | | 10
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
(6 rows)
scott=# select * from emp
scott-# where not(job=‘CLERK‘ or sal<=2000);
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+-------+-----------+------+--------------------+---------+------+--------
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7698 | BLAKE | MANAGER | 7839 | 01-MAY-81 00:00:00 | 2850.00 | | 30
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
7839 | KING | PRESIDENT | | 17-NOV-81 00:00:00 | 5000.00 | | 10
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
(6 rows)
范围查询：BETWEEN 最小值 AND 最大值
11使用between … and 操作符查询出工资范围在1500~3000（包括1500和3000元的全部雇员信息）
Oracle
SQL> select * from emp where sal between 1500 and 3000;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7499 ALLEN SALESMAN 7698 20-FEB-81
1600 300 30
7566 JONES MANAGER 7839 02-APR-81
2975 20
7698 BLAKE MANAGER 7839 01-MAY-81
2850 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
7844 TURNER SALESMAN 7698 08-SEP-81
1500 0 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7902 FORD ANALYST 7566 03-DEC-81
3000 20
7 rows selected.
PPAS
scott=# select * from emp where sal between 1500 and 3000;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+----------+------+--------------------+---------+--------+--------
7499 | ALLEN | SALESMAN | 7698 | 20-FEB-81 00:00:00 | 1600.00 | 300.00 | 30
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7698 | BLAKE | MANAGER | 7839 | 01-MAY-81 00:00:00 | 2850.00 | | 30
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
7844 | TURNER | SALESMAN | 7698 | 08-SEP-81 00:00:00 | 1500.00 | 0.00 | 30
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
(7 rows)
12查询出在1981年雇佣的全部雇员信息
Oracle
SQL> select * from emp where hiredate between ‘01-Jan-1981‘ and ‘31-Dec-1981‘;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7499 ALLEN SALESMAN 7698 20-FEB-81
1600 300 30
7521 WARD SALESMAN 7698 22-FEB-81
1250 500 30
7566 JONES MANAGER 7839 02-APR-81
2975 20
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7654 MARTIN SALESMAN 7698 28-SEP-81
1250 1400 30
7698 BLAKE MANAGER 7839 01-MAY-81
2850 30
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7839 KING PRESIDENT 17-NOV-81
5000 10
7844 TURNER SALESMAN 7698 08-SEP-81
1500 0 30
7900 JAMES CLERK 7698 03-DEC-81
950 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7902 FORD ANALYST 7566 03-DEC-81
3000 20
10 rows selected.
PPAS
scott=# select * from emp where hiredate between ‘01-1-1981‘ and ‘31-12-1981‘;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+-----------+------+--------------------+---------+---------+--------
7499 | ALLEN | SALESMAN | 7698 | 20-FEB-81 00:00:00 | 1600.00 | 300.00 | 30
7521 | WARD | SALESMAN | 7698 | 22-FEB-81 00:00:00 | 1250.00 | 500.00 | 30
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7654 | MARTIN | SALESMAN | 7698 | 28-SEP-81 00:00:00 | 1250.00 | 1400.00 | 30
7698 | BLAKE | MANAGER | 7839 | 01-MAY-81 00:00:00 | 2850.00 | | 30
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7839 | KING | PRESIDENT | | 17-NOV-81 00:00:00 | 5000.00 | | 10
7844 | TURNER | SALESMAN | 7698 | 08-SEP-81 00:00:00 | 1500.00 | 0.00 | 30
7900 | JAMES | CLERK | 7698 | 03-DEC-81 00:00:00 | 950.00 | | 30
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
(10 rows)
判断内容是否为null:IS NULL 、IS NOT NULL
13 使用==进行NULL比较
Oracle
SQL> select * from emp where comm=null and empno=7369;
no rows selected
PPAS
scott=# select * from emp where comm=null and empno=7369;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+-------+-----+-----+----------+-----+------+--------
(0 rows)
14查询出所有领取佣金的雇员的完整信息
Oracle
SQL> select * from emp where comm is not null;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7499 ALLEN SALESMAN 7698 20-FEB-81
1600 300 30
7521 WARD SALESMAN 7698 22-FEB-81
1250 500 30
7654 MARTIN SALESMAN 7698 28-SEP-81
1250 1400 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7844 TURNER SALESMAN 7698 08-SEP-81
1500 0 30
SQL> select * from emp where not comm is null;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7499 ALLEN SALESMAN 7698 20-FEB-81
1600 300 30
7521 WARD SALESMAN 7698 22-FEB-81
1250 500 30
7654 MARTIN SALESMAN 7698 28-SEP-81
1250 1400 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7844 TURNER SALESMAN 7698 08-SEP-81
1500 0 30
PPAS
scott=# select * from emp where comm is not null;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+----------+------+--------------------+---------+---------+--------
7499 | ALLEN | SALESMAN | 7698 | 20-FEB-81 00:00:00 | 1600.00 | 300.00 | 30
7521 | WARD | SALESMAN | 7698 | 22-FEB-81 00:00:00 | 1250.00 | 500.00 | 30
7654 | MARTIN | SALESMAN | 7698 | 28-SEP-81 00:00:00 | 1250.00 | 1400.00 | 30
7844 | TURNER | SALESMAN | 7698 | 08-SEP-81 00:00:00 | 1500.00 | 0.00 | 30
(4 rows)
scott=# select * from emp where not comm is null;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+----------+------+--------------------+---------+---------+--------
7499 | ALLEN | SALESMAN | 7698 | 20-FEB-81 00:00:00 | 1600.00 | 300.00 | 30
7521 | WARD | SALESMAN | 7698 | 22-FEB-81 00:00:00 | 1250.00 | 500.00 | 30
7654 | MARTIN | SALESMAN | 7698 | 28-SEP-81 00:00:00 | 1250.00 | 1400.00 | 30
7844 | TURNER | SALESMAN | 7698 | 08-SEP-81 00:00:00 | 1500.00 | 0.00 | 30
(4 rows)
15 查询所有不领取佣金的雇员的完整信息
Oracle
SQL> select * from emp where comm is null;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80
800 20
7566 JONES MANAGER 7839 02-APR-81
2975 20
7698 BLAKE MANAGER 7839 01-MAY-81
2850 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
7839 KING PRESIDENT 17-NOV-81
5000 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7876 ADAMS CLERK 7788 23-MAY-87
1100 20
7900 JAMES CLERK 7698 03-DEC-81
950 30
7902 FORD ANALYST 7566 03-DEC-81
3000 20
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7934 MILLER CLERK 7782 23-JAN-82
1300 10
10 rows selected.
PPAS
scott=# select * from emp where comm is null;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+-----------+------+--------------------+---------+------+--------
7369 | SMITH | CLERK | 7902 | 17-DEC-80 00:00:00 | 800.00 | | 20
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7698 | BLAKE | MANAGER | 7839 | 01-MAY-81 00:00:00 | 2850.00 | | 30
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
7839 | KING | PRESIDENT | | 17-NOV-81 00:00:00 | 5000.00 | | 10
7876 | ADAMS | CLERK | 7788 | 23-MAY-87 00:00:00 | 1100.00 | | 20
7900 | JAMES | CLERK | 7698 | 03-DEC-81 00:00:00 | 950.00 | | 30
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
7934 | MILLER | CLERK | 7782 | 23-JAN-82 00:00:00 | 1300.00 | | 10
(10 rows)
16列出所有不领取奖金，同时基本工资大于2000元的全部雇员信息
Oracle
SQL> select * from emp where comm is null and sal>2000;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7566 JONES MANAGER 7839 02-APR-81
2975 20
7698 BLAKE MANAGER 7839 01-MAY-81
2850 30
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
7839 KING PRESIDENT 17-NOV-81
5000 10
7902 FORD ANALYST 7566 03-DEC-81
3000 20
6 rows selected.
PPAS
scott=# select * from emp where comm is null and sal>2000;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+-------+-----------+------+--------------------+---------+------+--------
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7698 | BLAKE | MANAGER | 7839 | 01-MAY-81 00:00:00 | 2850.00 | | 30
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
7839 | KING | PRESIDENT | | 17-NOV-81 00:00:00 | 5000.00 | | 10
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
(6 rows)
17 查找不收取佣金 或 收取的佣金低于100元的员工
Oracle
SQL> select * from emp where comm is null or comm<100;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80
800 20
7566 JONES MANAGER 7839 02-APR-81
2975 20
7698 BLAKE MANAGER 7839 01-MAY-81
2850 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
7839 KING PRESIDENT 17-NOV-81
5000 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7844 TURNER SALESMAN 7698 08-SEP-81
1500 0 30
7876 ADAMS CLERK 7788 23-MAY-87
1100 20
7900 JAMES CLERK 7698 03-DEC-81
950 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7902 FORD ANALYST 7566 03-DEC-81
3000 20
7934 MILLER CLERK 7782 23-JAN-82
1300 10
11 rows selected.
PPAS
scott=# select * from emp where comm is null or comm<100;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+-----------+------+--------------------+---------+------+--------
7369 | SMITH | CLERK | 7902 | 17-DEC-80 00:00:00 | 800.00 | | 20
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7698 | BLAKE | MANAGER | 7839 | 01-MAY-81 00:00:00 | 2850.00 | | 30
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
7839 | KING | PRESIDENT | | 17-NOV-81 00:00:00 | 5000.00 | | 10
7844 | TURNER | SALESMAN | 7698 | 08-SEP-81 00:00:00 | 1500.00 | 0.00 | 30
7876 | ADAMS | CLERK | 7788 | 23-MAY-87 00:00:00 | 1100.00 | | 20
7900 | JAMES | CLERK | 7698 | 03-DEC-81 00:00:00 | 950.00 | | 30
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
7934 | MILLER | CLERK | 7782 | 23-JAN-82 00:00:00 | 1300.00 | | 10
(11 rows)
18查找收取佣金的员工的不同工作
Oracle
SQL> select distinct job from emp where comm is not null;
JOB
---------
SALESMAN
PPAS
scott=# select distinct job from emp where comm is not null;
job
----------
SALESMAN
(1 row)
列表范围查找：IN 、NOT IN
19查询出雇员编号是7369、7788/7566的雇员信息
Oracle
SQL> select * from emp where empno=7369 or empno=7788 or empno=7566;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80
800 20
7566 JONES MANAGER 7839 02-APR-81
2975 20
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
PPAS
scott=# select * from emp where empno=7369 or empno=7788 or empno=7566;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+-------+---------+------+--------------------+---------+------+--------
7369 | SMITH | CLERK | 7902 | 17-DEC-80 00:00:00 | 800.00 | | 20
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
(3 rows)
20 通过IN操作符指定查询范围
Oracle
SQL> select * from emp where empno IN(7369,7788,7566);
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80
800 20
7566 JONES MANAGER 7839 02-APR-81
2975 20
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
PPAS
scott=# select * from emp where empno IN(7369,7788,7566);
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+-------+---------+------+--------------------+---------+------+--------
7369 | SMITH | CLERK | 7902 | 17-DEC-80 00:00:00 | 800.00 | | 20
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
(3 rows)
21查询除了7369、7788、7566之外的雇员信息
Oracle
SQL> select * from emp where empno NOT IN(7369,7788,7566);
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7499 ALLEN SALESMAN 7698 20-FEB-81
1600 300 30
7521 WARD SALESMAN 7698 22-FEB-81
1250 500 30
7654 MARTIN SALESMAN 7698 28-SEP-81
1250 1400 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7698 BLAKE MANAGER 7839 01-MAY-81
2850 30
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
7839 KING PRESIDENT 17-NOV-81
5000 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7844 TURNER SALESMAN 7698 08-SEP-81
1500 0 30
7876 ADAMS CLERK 7788 23-MAY-87
1100 20
7900 JAMES CLERK 7698 03-DEC-81
950 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7902 FORD ANALYST 7566 03-DEC-81
3000 20
7934 MILLER CLERK 7782 23-JAN-82
1300 10
11 rows selected.
PPAS
scott=# select * from emp where empno NOT IN(7369,7788,7566);
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+-----------+------+--------------------+---------+---------+--------
7499 | ALLEN | SALESMAN | 7698 | 20-FEB-81 00:00:00 | 1600.00 | 300.00 | 30
7521 | WARD | SALESMAN | 7698 | 22-FEB-81 00:00:00 | 1250.00 | 500.00 | 30
7654 | MARTIN | SALESMAN | 7698 | 28-SEP-81 00:00:00 | 1250.00 | 1400.00 | 30
7698 | BLAKE | MANAGER | 7839 | 01-MAY-81 00:00:00 | 2850.00 | | 30
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7839 | KING | PRESIDENT | | 17-NOV-81 00:00:00 | 5000.00 | | 10
7844 | TURNER | SALESMAN | 7698 | 08-SEP-81 00:00:00 | 1500.00 | 0.00 | 30
7876 | ADAMS | CLERK | 7788 | 23-MAY-87 00:00:00 | 1100.00 | | 20
7900 | JAMES | CLERK | 7698 | 03-DEC-81 00:00:00 | 950.00 | | 30
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
7934 | MILLER | CLERK | 7782 | 23-JAN-82 00:00:00 | 1300.00 | | 10
(11 rows)
注意：在使用NOT IN操作符时列表不能有NULL
22在使用NOT IN操作符中 设置 null
Oracle
SQL> select * from emp where empno NOT IN(7369,7788,null);
no rows selected
PPAS
scott=# select * from emp where empno NOT IN(7369,7788,null);
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+-------+-----+-----+----------+-----+------+--------
(0 rows)
模糊查询：LIKE、NOT LIKE
23查询出雇员姓名是以S开头的全部雇员信息
Oracle
SQL> select * from emp where ename like ‘S%‘;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80
800 20
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
PPAS
scott=# select * from emp where ename like ‘S%‘;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+-------+---------+------+--------------------+---------+------+--------
7369 | SMITH | CLERK | 7902 | 17-DEC-80 00:00:00 | 800.00 | | 20
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
(2 rows)
24查询姓名的第2个字母是M的全部雇员信息
Oracle
SQL> select * from emp where ename like ‘_M%‘;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80
800 20
PPAS
scott=# select * from emp where ename like ‘_M%‘;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+-------+-------+------+--------------------+--------+------+--------
7369 | SMITH | CLERK | 7902 | 17-DEC-80 00:00:00 | 800.00 | | 20
(1 row)
25查询姓名中任意位置包含字母F的雇员信息
Oracle
SQL> select * from emp where ename like ‘%F%‘;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7902 FORD ANALYST 7566 03-DEC-81
3000 20
PPAS
scott=# select * from emp where ename like ‘%F%‘;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+-------+---------+------+--------------------+---------+------+--------
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
(1 row)
26查询姓名长度为6或者超过6的雇员信息
Oracle
SQL> select * from emp where ename like ‘______%‘;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7654 MARTIN SALESMAN 7698 28-SEP-81
1250 1400 30
7844 TURNER SALESMAN 7698 08-SEP-81
1500 0 30
7934 MILLER CLERK 7782 23-JAN-82
1300 10
PPAS
scott=# select * from emp where ename like ‘______%‘;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+----------+------+--------------------+---------+---------+--------
7654 | MARTIN | SALESMAN | 7698 | 28-SEP-81 00:00:00 | 1250.00 | 1400.00 | 30
7844 | TURNER | SALESMAN | 7698 | 08-SEP-81 00:00:00 | 1500.00 | 0.00 | 30
7934 | MILLER | CLERK | 7782 | 23-JAN-82 00:00:00 | 1300.00 | | 10
(3 rows)
27查询出基本工资中包含 1或者在81年雇佣的全部雇员信息
Oracle
SQL> select * from emp where sal like ‘%1%‘ or hiredate like ‘%81%‘;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7499 ALLEN SALESMAN 7698 20-FEB-81
1600 300 30
7521 WARD SALESMAN 7698 22-FEB-81
1250 500 30
7566 JONES MANAGER 7839 02-APR-81
2975 20
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7654 MARTIN SALESMAN 7698 28-SEP-81
1250 1400 30
7698 BLAKE MANAGER 7839 01-MAY-81
2850 30
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7839 KING PRESIDENT 17-NOV-81
5000 10
7844 TURNER SALESMAN 7698 08-SEP-81
1500 0 30
7876 ADAMS CLERK 7788 23-MAY-87
1100 20
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7900 JAMES CLERK 7698 03-DEC-81
950 30
7902 FORD ANALYST 7566 03-DEC-81
3000 20
7934 MILLER CLERK 7782 23-JAN-82
1300 10
12 rows selected.
PPAS
scott=# select * from emp where sal like ‘%1%‘ or hiredate like ‘%81%‘;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+-----------+------+--------------------+---------+---------+--------
7499 | ALLEN | SALESMAN | 7698 | 20-FEB-81 00:00:00 | 1600.00 | 300.00 | 30
7521 | WARD | SALESMAN | 7698 | 22-FEB-81 00:00:00 | 1250.00 | 500.00 | 30
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7654 | MARTIN | SALESMAN | 7698 | 28-SEP-81 00:00:00 | 1250.00 | 1400.00 | 30
7698 | BLAKE | MANAGER | 7839 | 01-MAY-81 00:00:00 | 2850.00 | | 30
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7839 | KING | PRESIDENT | | 17-NOV-81 00:00:00 | 5000.00 | | 10
7844 | TURNER | SALESMAN | 7698 | 08-SEP-81 00:00:00 | 1500.00 | 0.00 | 30
7876 | ADAMS | CLERK | 7788 | 23-MAY-87 00:00:00 | 1100.00 | | 20
7900 | JAMES | CLERK | 7698 | 03-DEC-81 00:00:00 | 950.00 | | 30
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
7934 | MILLER | CLERK | 7782 | 23-JAN-82 00:00:00 | 1300.00 | | 10
(12 rows)
28不设置查询关键字标识查询全部
Oracle
SQL> select * from emp where empno like ‘%%‘ or ename like ‘%%‘ or job like ‘%%‘
2 or hiredate like ‘%%‘ or sal like ‘%%‘ or comm like ‘%%‘;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80
800 20
7499 ALLEN SALESMAN 7698 20-FEB-81
1600 300 30
7521 WARD SALESMAN 7698 22-FEB-81
1250 500 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7566 JONES MANAGER 7839 02-APR-81
2975 20
7654 MARTIN SALESMAN 7698 28-SEP-81
1250 1400 30
7698 BLAKE MANAGER 7839 01-MAY-81
2850 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
7839 KING PRESIDENT 17-NOV-81
5000 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7844 TURNER SALESMAN 7698 08-SEP-81
1500 0 30
7876 ADAMS CLERK 7788 23-MAY-87
1100 20
7900 JAMES CLERK 7698 03-DEC-81
950 30
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7902 FORD ANALYST 7566 03-DEC-81
3000 20
7934 MILLER CLERK 7782 23-JAN-82
1300 10
14 rows selected.
PPAS
scott=# select * from emp where empno like ‘%%‘ or ename like ‘%%‘ or job like ‘%%‘
scott-# or hiredate like ‘%%‘ or sal like ‘%%‘ or comm like ‘%%‘;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+-----------+------+--------------------+---------+---------+--------
7369 | SMITH | CLERK | 7902 | 17-DEC-80 00:00:00 | 800.00 | | 20
7499 | ALLEN | SALESMAN | 7698 | 20-FEB-81 00:00:00 | 1600.00 | 300.00 | 30
7521 | WARD | SALESMAN | 7698 | 22-FEB-81 00:00:00 | 1250.00 | 500.00 | 30
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7654 | MARTIN | SALESMAN | 7698 | 28-SEP-81 00:00:00 | 1250.00 | 1400.00 | 30
7698 | BLAKE | MANAGER | 7839 | 01-MAY-81 00:00:00 | 2850.00 | | 30
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
7839 | KING | PRESIDENT | | 17-NOV-81 00:00:00 | 5000.00 | | 10
7844 | TURNER | SALESMAN | 7698 | 08-SEP-81 00:00:00 | 1500.00 | 0.00 | 30
7876 | ADAMS | CLERK | 7788 | 23-MAY-87 00:00:00 | 1100.00 | | 20
7900 | JAMES | CLERK | 7698 | 03-DEC-81 00:00:00 | 950.00 | | 30
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
7934 | MILLER | CLERK | 7782 | 23-JAN-82 00:00:00 | 1300.00 | | 10
(14 rows)
29找出部门10中所有经理（MANAGER）,部门20中所有业务员（CLERK），既不是经理又不是业务员但薪金大于2000元的所有员工的详细资料，并且要求 这些雇员的姓名中包含字母S或字母K
Oracle
SQL> select * from emp
2 where ((deptno=10 and job=‘MANAGER‘) or (deptno=20 and job=‘CLERK‘)
3 or (job not in (‘MANAGER‘,‘CLERK‘) and sal > 2000))
4 and (ename like ‘%S%‘ or ename like ‘%K%‘);
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80
800 20
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7839 KING PRESIDENT 17-NOV-81
5000 10
7876 ADAMS CLERK 7788 23-MAY-87
1100 20
PPAS
scott=# select * from emp
scott-# where ((deptno=10 and job=‘MANAGER‘) or (deptno=20 and job=‘CLERK‘)
scott(# or (job not in (‘MANAGER‘,‘CLERK‘) and sal > 2000))
scott-# and (ename like ‘%S%‘ or ename like ‘%K%‘);
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+-------+-----------+------+--------------------+---------+------+--------
7369 | SMITH | CLERK | 7902 | 17-DEC-80 00:00:00 | 800.00 | | 20
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
7839 | KING | PRESIDENT | | 17-NOV-81 00:00:00 | 5000.00 | | 10
7876 | ADAMS | CLERK | 7788 | 23-MAY-87 00:00:00 | 1100.00 | | 20
(5 rows)
对结果排序
30 查询员工的完整信息，并且按照级别工资由高到低进行排序
Oracle
SQL> select * from emp order by sal desc;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7839 KING PRESIDENT 17-NOV-81
5000 10
7902 FORD ANALYST 7566 03-DEC-81
3000 20
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7566 JONES MANAGER 7839 02-APR-81
2975 20
7698 BLAKE MANAGER 7839 01-MAY-81
2850 30
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7499 ALLEN SALESMAN 7698 20-FEB-81
1600 300 30
7844 TURNER SALESMAN 7698 08-SEP-81
1500 0 30
7934 MILLER CLERK 7782 23-JAN-82
1300 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7521 WARD SALESMAN 7698 22-FEB-81
1250 500 30
7654 MARTIN SALESMAN 7698 28-SEP-81
1250 1400 30
7876 ADAMS CLERK 7788 23-MAY-87
1100 20
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7900 JAMES CLERK 7698 03-DEC-81
950 30
7369 SMITH CLERK 7902 17-DEC-80
800 20
14 rows selected.
PPAS
scott=# select * from emp order by sal desc;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+-----------+------+--------------------+---------+---------+--------
7839 | KING | PRESIDENT | | 17-NOV-81 00:00:00 | 5000.00 | | 10
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7698 | BLAKE | MANAGER | 7839 | 01-MAY-81 00:00:00 | 2850.00 | | 30
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7499 | ALLEN | SALESMAN | 7698 | 20-FEB-81 00:00:00 | 1600.00 | 300.00 | 30
7844 | TURNER | SALESMAN | 7698 | 08-SEP-81 00:00:00 | 1500.00 | 0.00 | 30
7934 | MILLER | CLERK | 7782 | 23-JAN-82 00:00:00 | 1300.00 | | 10
7654 | MARTIN | SALESMAN | 7698 | 28-SEP-81 00:00:00 | 1250.00 | 1400.00 | 30
7521 | WARD | SALESMAN | 7698 | 22-FEB-81 00:00:00 | 1250.00 | 500.00 | 30
7876 | ADAMS | CLERK | 7788 | 23-MAY-87 00:00:00 | 1100.00 | | 20
7900 | JAMES | CLERK | 7698 | 03-DEC-81 00:00:00 | 950.00 | | 30
7369 | SMITH | CLERK | 7902 | 17-DEC-80 00:00:00 | 800.00 | | 20
(14 rows)
31利用序号设置排序列
Oracle
SQL> select empno,ename,sal,job from emp order by 3 desc;
EMPNO ENAME SAL JOB
---------- -------------------- ---------- ------------------
7839 KING 5000 PRESIDENT
7902 FORD 3000 ANALYST
7788 SCOTT 3000 ANALYST
7566 JONES 2975 MANAGER
7698 BLAKE 2850 MANAGER
7782 CLARK 2450 MANAGER
7499 ALLEN 1600 SALESMAN
7844 TURNER 1500 SALESMAN
7934 MILLER 1300 CLERK
7521 WARD 1250 SALESMAN
7654 MARTIN 1250 SALESMAN
EMPNO ENAME SAL JOB
---------- -------------------- ---------- ------------------
7876 ADAMS 1100 CLERK
7900 JAMES 950 CLERK
7369 SMITH 800 CLERK
14 rows selected.
PPAS
scott=# select empno,ename,sal,job from emp order by 3 desc;
empno | ename | sal | job
-------+--------+---------+-----------
7839 | KING | 5000.00 | PRESIDENT
7902 | FORD | 3000.00 | ANALYST
7788 | SCOTT | 3000.00 | ANALYST
7566 | JONES | 2975.00 | MANAGER
7698 | BLAKE | 2850.00 | MANAGER
7782 | CLARK | 2450.00 | MANAGER
7499 | ALLEN | 1600.00 | SALESMAN
7844 | TURNER | 1500.00 | SALESMAN
7934 | MILLER | 1300.00 | CLERK
7654 | MARTIN | 1250.00 | SALESMAN
7521 | WARD | 1250.00 | SALESMAN
7876 | ADAMS | 1100.00 | CLERK
7900 | JAMES | 950.00 | CLERK
7369 | SMITH | 800.00 | CLERK
(14 rows)
32按照级别工资由低到高排序
Oracle
SQL> select * from emp order by sal;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80
800 20
7900 JAMES CLERK 7698 03-DEC-81
950 30
7876 ADAMS CLERK 7788 23-MAY-87
1100 20
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7521 WARD SALESMAN 7698 22-FEB-81
1250 500 30
7654 MARTIN SALESMAN 7698 28-SEP-81
1250 1400 30
7934 MILLER CLERK 7782 23-JAN-82
1300 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7844 TURNER SALESMAN 7698 08-SEP-81
1500 0 30
7499 ALLEN SALESMAN 7698 20-FEB-81
1600 300 30
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7698 BLAKE MANAGER 7839 01-MAY-81
2850 30
7566 JONES MANAGER 7839 02-APR-81
2975 20
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7902 FORD ANALYST 7566 03-DEC-81
3000 20
7839 KING PRESIDENT 17-NOV-81
5000 10
14 rows selected.
SQL> select * from emp order by sal asc;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80
800 20
7900 JAMES CLERK 7698 03-DEC-81
950 30
7876 ADAMS CLERK 7788 23-MAY-87
1100 20
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7521 WARD SALESMAN 7698 22-FEB-81
1250 500 30
7654 MARTIN SALESMAN 7698 28-SEP-81
1250 1400 30
7934 MILLER CLERK 7782 23-JAN-82
1300 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7844 TURNER SALESMAN 7698 08-SEP-81
1500 0 30
7499 ALLEN SALESMAN 7698 20-FEB-81
1600 300 30
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7698 BLAKE MANAGER 7839 01-MAY-81
2850 30
7566 JONES MANAGER 7839 02-APR-81
2975 20
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7902 FORD ANALYST 7566 03-DEC-81
3000 20
7839 KING PRESIDENT 17-NOV-81
5000 10
14 rows selected.
PPAS
scott=# select * from emp order by sal;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+-----------+------+--------------------+---------+---------+--------
7369 | SMITH | CLERK | 7902 | 17-DEC-80 00:00:00 | 800.00 | | 20
7900 | JAMES | CLERK | 7698 | 03-DEC-81 00:00:00 | 950.00 | | 30
7876 | ADAMS | CLERK | 7788 | 23-MAY-87 00:00:00 | 1100.00 | | 20
7521 | WARD | SALESMAN | 7698 | 22-FEB-81 00:00:00 | 1250.00 | 500.00 | 30
7654 | MARTIN | SALESMAN | 7698 | 28-SEP-81 00:00:00 | 1250.00 | 1400.00 | 30
7934 | MILLER | CLERK | 7782 | 23-JAN-82 00:00:00 | 1300.00 | | 10
7844 | TURNER | SALESMAN | 7698 | 08-SEP-81 00:00:00 | 1500.00 | 0.00 | 30
7499 | ALLEN | SALESMAN | 7698 | 20-FEB-81 00:00:00 | 1600.00 | 300.00 | 30
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7698 | BLAKE | MANAGER | 7839 | 01-MAY-81 00:00:00 | 2850.00 | | 30
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
7839 | KING | PRESIDENT | | 17-NOV-81 00:00:00 | 5000.00 | | 10
(14 rows)
scott=# select * from emp order by sal asc;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+-----------+------+--------------------+---------+---------+--------
7369 | SMITH | CLERK | 7902 | 17-DEC-80 00:00:00 | 800.00 | | 20
7900 | JAMES | CLERK | 7698 | 03-DEC-81 00:00:00 | 950.00 | | 30
7876 | ADAMS | CLERK | 7788 | 23-MAY-87 00:00:00 | 1100.00 | | 20
7521 | WARD | SALESMAN | 7698 | 22-FEB-81 00:00:00 | 1250.00 | 500.00 | 30
7654 | MARTIN | SALESMAN | 7698 | 28-SEP-81 00:00:00 | 1250.00 | 1400.00 | 30
7934 | MILLER | CLERK | 7782 | 23-JAN-82 00:00:00 | 1300.00 | | 10
7844 | TURNER | SALESMAN | 7698 | 08-SEP-81 00:00:00 | 1500.00 | 0.00 | 30
7499 | ALLEN | SALESMAN | 7698 | 20-FEB-81 00:00:00 | 1600.00 | 300.00 | 30
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7698 | BLAKE | MANAGER | 7839 | 01-MAY-81 00:00:00 | 2850.00 | | 30
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
7839 | KING | PRESIDENT | | 17-NOV-81 00:00:00 | 5000.00 | | 10
(14 rows)
33查询出所有业务员（CLERK）的详细资料，并且按照基本工资由低到高排序
Oracle
SQL> select * from emp where job=‘CLERK‘ order by sal;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80
800 20
7900 JAMES CLERK 7698 03-DEC-81
950 30
7876 ADAMS CLERK 7788 23-MAY-87
1100 20
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7934 MILLER CLERK 7782 23-JAN-82
1300 10
PPAS
scott=# select * from emp where job=‘CLERK‘ order by sal;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+-------+------+--------------------+---------+------+--------
7369 | SMITH | CLERK | 7902 | 17-DEC-80 00:00:00 | 800.00 | | 20
7900 | JAMES | CLERK | 7698 | 03-DEC-81 00:00:00 | 950.00 | | 30
7876 | ADAMS | CLERK | 7788 | 23-MAY-87 00:00:00 | 1100.00 | | 20
7934 | MILLER | CLERK | 7782 | 23-JAN-82 00:00:00 | 1300.00 | | 10
(4 rows)
34查询出所有雇员信息，要求按照基本工资由高到低排序，如果工资相等则按照雇佣日期由早到晚进行排序
Oracle
SQL> select * from emp order by sal desc,hiredate asc;
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7839 KING PRESIDENT 17-NOV-81
5000 10
7902 FORD ANALYST 7566 03-DEC-81
3000 20
7788 SCOTT ANALYST 7566 19-APR-87
3000 20
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7566 JONES MANAGER 7839 02-APR-81
2975 20
7698 BLAKE MANAGER 7839 01-MAY-81
2850 30
7782 CLARK MANAGER 7839 09-JUN-81
2450 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7499 ALLEN SALESMAN 7698 20-FEB-81
1600 300 30
7844 TURNER SALESMAN 7698 08-SEP-81
1500 0 30
7934 MILLER CLERK 7782 23-JAN-82
1300 10
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7521 WARD SALESMAN 7698 22-FEB-81
1250 500 30
7654 MARTIN SALESMAN 7698 28-SEP-81
1250 1400 30
7876 ADAMS CLERK 7788 23-MAY-87
1100 20
EMPNO ENAME JOB MGR HIREDATE
---------- -------------------- ------------------ ---------- ------------
SAL COMM DEPTNO
---------- ---------- ----------
7900 JAMES CLERK 7698 03-DEC-81
950 30
7369 SMITH CLERK 7902 17-DEC-80
800 20
14 rows selected.
PPAS
scott=# select * from emp order by sal desc,hiredate asc;
empno | ename | job | mgr | hiredate | sal | comm | deptno
-------+--------+-----------+------+--------------------+---------+---------+--------
7839 | KING | PRESIDENT | | 17-NOV-81 00:00:00 | 5000.00 | | 10
7902 | FORD | ANALYST | 7566 | 03-DEC-81 00:00:00 | 3000.00 | | 20
7788 | SCOTT | ANALYST | 7566 | 19-APR-87 00:00:00 | 3000.00 | | 20
7566 | JONES | MANAGER | 7839 | 02-APR-81 00:00:00 | 2975.00 | | 20
7698 | BLAKE | MANAGER | 7839 | 01-MAY-81 00:00:00 | 2850.00 | | 30
7782 | CLARK | MANAGER | 7839 | 09-JUN-81 00:00:00 | 2450.00 | | 10
7499 | ALLEN | SALESMAN | 7698 | 20-FEB-81 00:00:00 | 1600.00 | 300.00 | 30
7844 | TURNER | SALESMAN | 7698 | 08-SEP-81 00:00:00 | 1500.00 | 0.00 | 30
7934 | MILLER | CLERK | 7782 | 23-JAN-82 00:00:00 | 1300.00 | | 10
7521 | WARD | SALESMAN | 7698 | 22-FEB-81 00:00:00 | 1250.00 | 500.00 | 30
7654 | MARTIN | SALESMAN | 7698 | 28-SEP-81 00:00:00 | 1250.00 | 1400.00 | 30
7876 | ADAMS | CLERK | 7788 | 23-MAY-87 00:00:00 | 1100.00 | | 20
7900 | JAMES | CLERK | 7698 | 03-DEC-81 00:00:00 | 950.00 | | 30
7369 | SMITH | CLERK | 7902 | 17-DEC-80 00:00:00 | 800.00 | | 20
(14 rows)
本连载博客主要探讨Oracle与PPAS(PostgreSQL)数据库的差异，以帮助更多读者了解如何实现数据库迁移！
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原文地址：http://www.cnblogs.com/songyuejie/p/5600209.html
