Oracle分區修改的語句

Oracle分區修改的語句

 

一、增長一個分區
ALTER TABLE sales
      ADD PARTITION jan96 VALUES LESS THAN ( '01-FEB-1999' )
      TABLESPACE tsx;
增長一個列表分區
ALTER TABLE q1_sales_by_region
   ADD PARTITION q1_nonmainland VALUES ('HI', 'PR')
      STORAGE (INITIAL 20K NEXT 20K) TABLESPACE tbs_3
      NOLOGGING;
二、合併分區

alter table dept coalesce partition

三、刪除分區
ALTER TABLE sales DROP PARTITION dec98;
ALTER INDEX sales_area_ix REBUILD（若是含有全局索引）;

四、合併分區
ALTER TABLE four_seasons
MERGE PARTITIONS quarter_one, quarter_two INTO PARTITION quarter_two;


Then, rebuild the local index for the affected partition.

-- Rebuild index for quarter_two, which has been marked unusable
-- because it has not had all of the data from Q1 added to it.
-- Rebuilding the index will correct this.
--
ALTER TABLE four_seasons MODIFY PARTITION
quarter_two REBUILD UNUSABLE LOCAL INDEXES;

五、移動一個分區
ALTER TABLE parts MOVE PARTITION depot2
     TABLESPACE ts094 NOLOGGING;

六、重建一個local索引
ALTER INDEX I_FOUR_SEASONS_L  REBUILD PARTITION I_QUARTER_FOUR

七、重命名一個分區
ALTER TABLE scubagear RENAME PARTITION sys_p636 TO tanks

八、一個分區拆分爲兩個分區
ALTER TABLE RANGE_EXAMPLE SPLIT PARTITION
      PART_1 at
      (TO_DATE(' 1994-05-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS'))
       INTO ( PARTITION  PART_1 tablespace st1,
        PARTITION  PART_3 tablespace users)

九、truncate一個分區
ALTER TABLE sales TRUNCATE PARTITION dec98;
ALTER INDEX sales_area_ix REBUILD;

十、若是存在約束的狀況，先disable約束
ALTER TABLE sales
    DISABLE CONSTRAINT dname_sales1;
ALTER TABLE sales TRUNCATE PARTITTION dec94;
ALTER TABLE sales
    ENABLE CONSTRAINT dname_sales1;