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SELECT osuser, username, sql_text from v$session a, v$sqltext b where a.sql_address =b.address order by address, piece;
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 select username,sid,opname, round(sofar*100 / totalwork,0) || '%' as progress, time_remaining,sql_text from v$session_longops , v$sql where time_remaining <> 0 and sql_address = address and sql_hash_value = hash_value
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  Èç¹û¸ú×Ù±ðÈ˵ĻỰ£¬ÐèÒªµ÷ÓÃÒ»¸ö°ü    
  exec   dbms_system.set_sql_trace_in_session(sid,serial#,true|false)    
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  exec   dbms_system.set_sql_trace_in_session(sid,serial#,8,’’)£¬ÕâÀïµÄ8ÊǸú×Ù¼¶±ð    
  ¸ú×ÙµÄÐÅÏ¢ÔÚuser_dump_dest   Ŀ¼Ï¿ÉÒÔÕÒµ½    
  ¿ÉÒÔͨ¹ýTkprofÀ´½âÎö¸ú×ÙÎļþ£¬Èç    
  Tkprof   Ô­Îļþ   Ä¿±êÎļþ   sys=n    
   
   
  ÔõôÉèÖÃÕû¸öÊý¾Ý¿âϵͳ¸ú×Ù    
  [A]ÆäʵÎĵµÉϵÄalter   system   set   sql_trace=trueÊDz»³É¹¦µÄ    
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      ‘10046   trace   name   context   forever,level   1’;    
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create or replace type mingxitype as object(
goodsid varchar(15),
incount int,
providerid varchar(10)
)not final;
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connect /as sysdba
alter user scott account unlock;
alter user scott identified by manager;
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grant  select on dept to nmerp;
revoke select on dept to nmerp;
select * from scott.dept
create table abc(a varchar2(10),b char(10));
alter& ......

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