21. 在ORACLE TABLE中如何抓取MEMO类型字段为空的资料记录?
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) WHERE BBB.DPT_NO IS NOT NULL;
23. P4计算机安装方法
将SYMCJIT.DLL改为SYSMCJIT.OLD
24. 何查询SERVER是不是OPS?
SELECT * FROM V$OPTION;
如果PARALLEL SERVER=TRUE则有OPS能
25. 何查询每个用户的权限?
SELECT * FROM DBA_SYS_PRIVS;
26. 如何将表移动表空间?
ALTER TABLE TABLE_NAME MOVE TABLESPACE_NAME;
27. 如何将索引移动表空间?
ALTER INDEX INDEX_NAME REBUILD TABLESPACE TABLESPACE_NAME;
28. 在LINUX,UNIX下如何激活DBA STUDIO?
OEMAPP DBASTUDIO
29. 查询锁的状况的对象有?
V$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, 'Row-S (SS)', 3, 'Row-X (SX)', 4, 'Share', 5, 'S/Row-X (SSX)', 6, 'Exclusive', TO_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(REQUEST)) MODE_REQUESTED, O.OWNER||'.'||O.OBJECT_NAME||' ('||O.OBJECT_TYPE||')', S.TYPE LOCK_TYPE, L.ID1 LOCK_ID1, L.ID2 LOCK_ID2 FROM V$LOCK L, SYS.DBA_OBJECTS O, V$SESSION S WHERE L.SID = S.SID AND L.ID1 = O.OBJECT_ID ;
30. 如何解锁?
ALTER SYSTEM KILL SESSION ‘SID,SERIR#’;