select t.*, t.rowid from t_dept_type t 部门select t.*, t.rowid from t_company t 公司select t.*, t.rowid from t_employees t 员工 select a.departmentid,a.user ...
分类:
数据库 时间:
2016-06-15 01:36:12
阅读次数:
234
return service指在复制源和目标之间的同步模式,可以是no return(异步),return receipt(准同步)和return twosafe(全同步)。
本文的描述对于active standby和classic replication都适用。脚本准备$ cat insert1.sql
INSERT INTO employees VALUES
( 202,...
分类:
数据库 时间:
2016-06-06 01:16:56
阅读次数:
248
一、 ROWID的概念 存储了row在数据文件中的具体位置:64位 编码的数据,A-Z, a-z, 0-9, +, 和 /, row在数据块中的存储方式 SELECT ROWID, last_name FROM hr.employees WHERE department_id = 20; 比 如:O ...
分类:
数据库 时间:
2016-05-28 23:01:57
阅读次数:
242
题目链接:https://leetcode.com/problems/employees-earning-more-than-their-managers/题目:
The Employee table holds all employees including their managers. Every employee has an Id, and there is also a column...
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其他好文 时间:
2016-05-18 19:13:02
阅读次数:
163
create user bryan identified by bryan; grant create session to bryan; grant create table to bryan; connect bryan/bryan; create table bryan_employees ( ...
分类:
数据库 时间:
2016-05-13 17:16:02
阅读次数:
265
Description
There is going to be a party to celebrate the 80-th Anniversary of the Ural State University. The University has a hierarchical structure of employees. It means that the superviso...
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其他好文 时间:
2016-05-07 10:36:33
阅读次数:
237
SQL标准中的Join的类型:
首先,设置表employees和department的数据为:
1、inner join … on操作类型
内连接inner join是基于连接谓词将两张表(如A和B)的列组合在一起的,产生新的结果表。
例子:SELECT *
FROM employees a
inner join department b
ON a.department_id = b.de...
分类:
数据库 时间:
2016-04-27 01:49:18
阅读次数:
332
创建一个函数 创建一个trigger, 将表和函数绑定 ALTER TRIGGER trigger_name ON table_name RENAME TO new_name; ALTER TRIGGER last_name_changes ON employees RENAME TO log_la... ...
分类:
数据库 时间:
2016-04-24 12:27:04
阅读次数:
180
The ng-init directive allows you to evaluate an expression in the current scope. In the following example, the ng-init directive initializes employees ...
分类:
Web程序 时间:
2016-04-24 00:58:33
阅读次数:
226
In one organization they have n different committees. The organization has a very large number of employees. Each employee is a member of each committee.
Each committee has a quorum: the smallest number of members that have to be present to have an officia...
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其他好文 时间:
2016-04-15 02:17:37
阅读次数:
215