Oracle自学笔记——分区表中添加分区

1.先创建一个分区表test（没有MAXVALUE分区）

HR@PROD>create table hr.test(

2 id number,

3 name varchar2(20))

4 PARTITION BY RANGE (id)

5 (PARTITION p1 VALUES LESS THAN (10),

6 PARTITION p2 VALUES LESS THAN (20),

7 PARTITION p3 VALUES LESS THAN (30)

8 );

Table created.

2.查看test分区表的分区信息

HR@PROD>select TABLE_NAME,PARTITION_NAME

2 from user_tab_partitions

3 where table_name='TEST';

TABLE_NAME PARTITION_NAME

------------------------------ ------------------------------

TEST P1

TEST P2

TEST P3

3.添加分区

HR@PROD>ALTER TABLE hr.test ADD PARTITION p4 VALUES LESS THAN (40);

Table altered.

4.查看test分区表的分区信息，发现分区已成功添加

HR@PROD>select TABLE_NAME,PARTITION_NAME

2 from user_tab_partitions

3 where table_name='TEST';

TABLE_NAME PARTITION_NAME

------------------------------ ------------------------------

TEST P1

TEST P2

TEST P3

TEST P4

5.这时，再创建一个有maxvalue分区的分区表test1

HR@PROD>create table hr.test1(

2 id number,

3 name varchar2(20))

4 PARTITION BY RANGE (id)

5 (PARTITION p1 VALUES LESS THAN (10),

6 PARTITION p2 VALUES LESS THAN (20),

7 PARTITION p3 VALUES LESS THAN (30),

8 PARTITION p_max VALUES LESS THAN (MAXVALUE)

9 );

Table created.

6.查看test1的分区信息

HR@PROD>select TABLE_NAME,PARTITION_NAME

2 from user_tab_partitions

3 where table_name='TEST1';

TABLE_NAME PARTITION_NAME

------------------------------ ------------------------------

TEST1 P1

TEST1 P2

TEST1 P3

TEST1 P_MAX

7.往test1中添加分区，发现add partition报错

HR@PROD>ALTER TABLE hr.test1 ADD PARTITION p4 VALUES LESS THAN (40);

ALTER TABLE hr.test1 ADD PARTITION p4 VALUES LESS THAN (40)

*

ERROR at line 1:

ORA-14074: partition bound must collate higher than that of the last partition

8.使用split语句添加分区

HR@PROD>ALTER TABLE hr.test1 SPLIT PARTITION p_max AT (40) INTO (PARTITION p4,PARTITION p_max);

Table altered.

9.查看分区表test1的分区信息

HR@PROD>select TABLE_NAME,PARTITION_NAME

2 from user_tab_partitions

3 where table_name='TEST1';

TABLE_NAME PARTITION_NAME

------------------------------ ------------------------------

TEST1 P1

TEST1 P2

TEST1 P3

TEST1 P4

TEST1 P_MAX