Oracle分区之四：分区维护和管理

核心提示：T3 HR P_OTHERS

T3 HR P_OTHERS 0

实验一(SPLIT 分区)
alter table t3 split partition p1 values ('JS') into
(partition p1_1,partition p1_2);
SQL> select TABLE_NAME, TABLE_OWNER, PARTITION_NAME, SUBPARTITION_COUNT from dba_tab_partitions where table_name='T3';
TABLE_NAME TABLE_OWNER PARTITION_NAME SUBPARTITION_COUNT
------------------------------ ------------------------------ ------------------------------ ------------------
T3 HR P1_1 0
T3 HR P1_2 0
T3 HR P2 0
T3 HR P3 0
T3 HR P_OTHERS 0

实验二(merge 分区)
alter table t3 merge partitions p1_1,p1_2 into partition p1;
SQL> select TABLE_NAME, TABLE_OWNER, PARTITION_NAME, SUBPARTITION_COUNT from dba_tab_partitions where table_name='T3';
TABLE_NAME TABLE_OWNER PARTITION_NAME SUBPARTITION_COUNT
------------------------------ ------------------------------ ------------------------------ ------------------
T3 HR P1 0
T3 HR P2 0
T3 HR P3 0
T3 HR P_OTHERS 0
实验三、
alter table t3 split partition p2 values ('BJ','TJ') into
(partition p2_1,partition p2_2);
SQL> select TABLE_NAME, TABLE_OWNER, PARTITION_NAME, SUBPARTITION_COUNT from dba_tab_partitions where table_name='T3';
TABLE_NAME TABLE_OWNER PARTITION_NAME SUBPARTITION_COUNT
------------------------------ ------------------------------ ------------------------------ ------------------
T3 HR P1 0
T3 HR P2_1 0
T3 HR P2_2 0
T3 HR P3 0