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上完1Z0-052第9章:锁
进行1Z0-052第10章:undo
1Z0-052共19章(上完4章),1Z0-053共21章(上完0章)和1Z0-063多租户部分共9章(上完0章)
总共上完全部49章中的4章
- select sid, s.SERIAL#
- from v_$session s
- where s.BLOCKING_SESSION is not null ;
-
-
- select s.blocking_session from v$session s
- where s.BLOCKING_SESSION is not null ;
-
- select serial# from v$session
- where sid=137;
-
-
- alter system kill session '137,3401' immediate;
-
- select * from v$transaction;
-
- select * from v$session where sid=71;
-
- select * from dba_rollback_segs;
-
- ----
-
- select sid from v$session where terminal='pts/3';
-
- select *
- from v$lock where sid=140 ;
- ---
- select * from dba_tablespaces;
- alter tablespace undotbs1 retention noguarantee;
- select * from v$undostat;
- select * from V$ROLLSTAT;
- select * from dict where table_name like '%UNDO%' or table_name like '%ROLL%';
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