标签：number
列********************************************************************************
创建分区表
CREATE TABLE ccc1
( id number(8),name varchar2(30),sales_date date)
PARTITION BY RANGE (sales_date)
(PARTITION p1 VALUES LESS THAN ( TO_DATE(‘01-JAN-1999‘,‘DD-MON-YYYY‘)) tablespace zh,
PARTITION p2 VALUES LESS THAN ( TO_DATE(‘01-JAN-2000‘,‘DD-MON-YYYY‘)) tablespace zh,
PARTITION p3 VALUES LESS THAN ( TO_DATE(‘01-JAN-2001‘,‘DD-MON-YYYY‘)) tablespace zh,
PARTITION p4 VALUES LESS THAN ( TO_DATE(‘01-JAN-2002‘,‘DD-MON-YYYY‘)) tablespace zh,
PARTITION p5 VALUES LESS THAN (MAXVALUE) tablespace zh
);
插入数据
insert into ccc1 values(1,‘PC1‘,to_date(‘17-FEB-2000‘,‘DD-MON-YYYY‘));
insert into ccc1 values(2,‘PC2‘,to_date(‘17-FEB-2001‘,‘DD-MON-YYYY‘));
insert into ccc1 values(3,‘PC3‘,‘17-FEB-1999‘);
insert into ccc1 values(4,‘PC4‘,‘15-FEB-2000‘);
insert into ccc1 values(5,‘PC5‘,‘17-FEB-2002‘);
insert into ccc1 values(6,‘PC6‘,‘12-FEB-2001‘);
insert into ccc1 values(7,‘PC7‘,‘11-FEB-1998‘);
insert into ccc1 values(8,‘PC8‘,‘13-FEB-2002‘);
SQL> insert into ccc1 values(8,‘PC8‘,‘13-FEB-2013‘);
创建唯一索引
CREATE unique INDEX i_ccc1_id ON ccc1(id) GLOBAL
PARTITION BY HASH (id)
(PARTITION pi1 TABLESPACE zh,
PARTITION pi2 TABLESPACE zh,
PARTITION pi3 TABLESPACE zh,
PARTITION pi4 TABLESPACE zh) parallel 4;
创建失败有重复值 --去重查询id相同的为重复但rowid都是不同的。以此去重。
SQL> select a.* from ccc1 a where a.rowid in(select min(b.rowid) from ccc1 b where b.id=a.id);
查询重复数据
SQL> select a.* from ccc1 a where a.rowid not in(select min(b.rowid) from ccc1 b where b.id=a.id);
删除重复数据
SQL> delete from ccc1 a where a.rowid not in(select min(b.rowid) from ccc1 b where b.id=a.id);
再创建索引 全局唯一
CREATE unique INDEX i_ccc1_id ON ccc1(id) GLOBAL
PARTITION BY HASH (id)
(PARTITION pi1 TABLESPACE zh,
PARTITION pi2 TABLESPACE zh,
PARTITION pi3 TABLESPACE zh,
PARTITION pi4 TABLESPACE zh) parallel 4;
创建局部分区索引
SQL> create index i_ccc1_date on ccc1(sales_date) local;
创建不分区索引
SQL> create index i_ccc1_name on ccc1(name);
查询索引信息
SQL> select index_name,index_type,table_name,tablespace_name,partitioned from dba_indexes where table_name =‘CCC1‘;
添加分区
SQL> alter table ccc1 add partition p6 values less than (to_date(‘2019-01-01‘,‘yyyy-mm-dd‘)) tablespace zh;
alter table ccc1 add partition p6values less than (to_date(‘2019-01-01‘,‘yyyy-mm-dd‘)) tablespace zh
*
ERROR at line 1:
ORA-14074: partition bound must collate higher than that of the last partition
报错因为前面用过PARTITION p5 VALUES LESS THAN (MAXVALUE)所以有俩种办法解决
第一删除p5重新添加
Alter table ccc1 droppartition p5;
第二拆分分区 :split 合并分区gerge
查询分区表
SQL> SELECT TABLESPACE_NAME,TABLE_NAME, PARTITION_NAME
FROM DBA_TAB_PARTITIONS WHERE TABLE_NAME=‘CCC1‘
ORDER BY TABLESPACE_NAME;
本文出自 “君落尘的博客” 博客，请务必保留此出处http://lchen.blog.51cto.com/9200824/1538162
标签：number
原文地址：http://lchen.blog.51cto.com/9200824/1538162
