–每500条数据提交一次DECLARE CNT NUMBER(10):=0; I NUMBER(10); BEGIN SELECT COUNT(*) INTO CNT FROM DBBC011 where qxlxzs is null;FOR I IN 1..TRUNC(CNT/500)+1 LOOP DELETE FROM DBBC011 where qxlxzs is null AND ROWNUM<=500; COMMIT; END LOOP; END;