21. 在ORACLE TABLE中如何抓取MEMO类型栏位为空的资料记录?select remark from oms_flowrec where trim(' ' from remark) is not null ;
22. 如何用BBB表的资料去更新AAA表的资料(有关联的字段)UPDATE AAA SET BNS_SNM=(SELECT BNS_SNM FROM BBB WHERE AAA.DPT_NO=BBB.DPT_NO) W
HERE BBB.DPT_NO IS NOT NULL; 23. P4电脑安装方法将SYMCJIT.DLL改为SYSMCJIT.OLD 24. 何查询SERVER是不是OPS?SELECT * FROM V$OPTION;如果PARALLEL SERVER=TRUE则有OPS能 25. 何查询每个用户的权限?SELECT * FROM DBA_SYS_PRIVS; 26. 如何将表移动表空间?ALTER TABLE TABLE_NAME MOVE TABLESPACE_NAME;
27. 如何将索引移动表空间?ALTER INDEX INDEX_NAME REBUILD TABLESPACE TABLESPACE_NAME;
28. 在LINUX,UNIX下如何启动DBA STUDIO?OEMAPP DBASTUDIO 29. 查询锁的状况的对象有?V$LOCK, V$LOCKED_OBJECT, V$SESSION, V$SQLAREA, V$PROCESS ;查询锁的表的方法:SELECT S.SID SESSION_ID, S.USERNAME, DECODE(LMODE, 0, 'None', 1, 'Null', 2, 'R
ow-S (SS)', 3, 'Row-X (SX)', 4, 'Share', 5, 'S/Row-X (SSX)', 6, 'Exclusive', T
O_CHAR(LMODE)) MODE_HELD, DECODE(REQUEST, 0, 'None', 1, 'Null', 2, 'Row-S (SS)
', 3, 'Row-X (SX)', 4, 'Share', 5, 'S/Row-X (SSX)', 6, 'Exclusive', TO_CHAR(RE
QUEST)) MODE_REQUESTED, O.OWNER||'.'||O.OBJECT_NAME||' ('||O.OBJECT_TYPE||')',
S.TYPE LOCK_TYPE, L.ID1 LOCK_ID1, L.ID2 LOCK_ID2 FROM V$LOCK L, SYS.DBA_OBJEC
TS O, V$SESSION S WHERE L.SID = S.SID AND L.ID1 = O.OBJECT_ID ;
30. 如何解锁?ALTER SYSTEM KILL SESSION ‘SID,SERIR#’;