采用存储过程的方式批量更新数据

DECLARE
MAX_ROWS            NUMBER DEFAULT 5000;
ROW_ID_TABLE        DBMS_SQL.UROWID_TABLE;
DATE_TIME_TABLE      DBMS_SQL.DATE_TABLE;
CURSOR C1 IS
SELECT /*+ use_hash(t1,t2) parallel(t1,2) parallel(t2,2) */
T1.DATE_TIME, T2.ROWID
FROM TEST_TABLE_1 T1, TEST_TABLE_2 T2
WHERE T1.TABLE_ID = T2.TABLE_ID
AND T2.DATE_TIME IS NULL
AND T1.DATE_TIME IS NOT NULL
ORDER BY T2.ROWID;
BEGIN
OPEN C1;
LOOP
EXIT WHEN C1%NOTFOUND;
FETCH C1 BULK COLLECT
INTO DATE_TIME_TABLE, ROW_ID_TABLE LIMIT MAX_ROWS;
FORALL I IN 1 .. ROW_ID_TABLE.COUNT
UPDATE TEST_TABLE_2
SET DATE_TIME = DATE_TIME_TABLE(I), LCD=SYSDATE
WHERE ROWID = ROW_ID_TABLE(I);
COMMIT;
END LOOP;
CLOSE C1;
END;
/