Oracle lock table query and unlocking method

Hello everyone , I meet you again , I'm your friend, Quan Jun .

We usually use it here PL/SQL, Always accidentally lock the watch , So today I sorted out a simple method to unlock and query the lock table ;

One 、 First PL/SQL Use the administrator's account （system/admin etc. ） Sign in , The administrator's account and password are based on personal settings , Connection is a general choice Normal, You can also choose SYSDBA;

Two 、 relevant SQL sentence ：

-- The following are related tables 
SELECT*FROMv$lock;
SELECT*FROMv$sqlarea;
SELECT*FROMv$session;
SELECT*FROMv$process;
SELECT*FROMv$locked_object;
SELECT*FROMall_objects;
SELECT*FROMv$session_wait;

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– View locked table information

 select sess.sid,sess.serial#, lo.oracle_username,lo.os_user_name, ao.object_name,lo.locked_mode  from v$locked_object lo,dba_objects ao,v$session sess where ao.object_id=lo.object_id and lo.session_id=sess.sid;

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– Kill the lock table process

alter system kill session '68,51';-- Respectively SID and SERIAL# Number 

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– View the table that caused the lock in the database SQL sentence

SELECT A.USERNAME,
       A.MACHINE,
       A.PROGRAM,
       A.SID,
       A.SERIAL#,
       A.STATUS,
       C.PIECE,
       C.SQL_TEXT
  FROM V$SESSION A, V$SQLTEXT C
 WHERE A.SID IN (SELECT DISTINCT T2.SID
                   FROM V$LOCKED_OBJECT T1, V$SESSION T2
                  WHERE T1.SESSION_ID = T2.SID)
   AND A.SQL_ADDRESS = C.ADDRESS(+)
 ORDER BY C.PIECE;

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