1、解锁用户
以dba身份登录 sqlplus / as sysdba
alter user scott account unlock;
2、解锁表
alter system kill session
<!----1.查出锁定object的session的信息以及被锁定的object名------------------------------------>
SELECT l.session_id sid, s.serial#, l.locked_mode,l.oracle_username, l.os_user_name,s.machine, s.terminal, o.object_name, s.logon_time
FROM v$locked_object l, all_objects o, v$session s
WHERE l.object_id = o.object_id
AND l.session_id = s.sid
ORDER BY sid, s.serial# ;
<!---------------------2.查出锁定表的session的 sid, serial#,os_user_name, machine name, terminal和
执行的语句 --比上面那段多出sql_text和action ----------------------------------------------------------->
SELECT l.session_id sid, s.serial#, l.locked_mode, l.oracle_username, s.user#, l.os_user_name,s.machine, s.terminal,a.sql_text, a.action
FROM v$sqlarea a,v$session s, v$locked_object l
WHERE l.session_id = s.sid
AND s.prev_sql_addr = a.address
ORDER BY sid, s.serial#;
<!-------------------------3.查出锁定表的sid, serial#,os_user_name, machine_name, terminal，锁的type,mode ------------------------------------------------------------>
SELECT s.sid, s.serial#, s.username, s.schemaname, s.osuser, s.process, s.machine, s.terminal, s.logon_time, l.type
FROM v$session s, v$lock l
WHERE s.sid = l.sid
AND s.username IS NOT NULL
ORDER BY sid;
<!--------杀锁命令---------->
alter system kill session 'sid,serial#';
alter system kill session '3,21395';
---------------------------
alter system kill session 'sid,serial#' SELECT /*+ rule */ s.username, decode(l.type,'TM','TABLE LOCK', 'TX','ROW LOCK', NULL) LOCK_LEVEL, o.owner,o.object_name,o.object_type, s.sid,s.serial#,s.terminal,s.machine,s.program,s.osuser
FROM v$session s,v$lock l,dba_objects o
WHERE l.sid = s.sid
AND l.id1 = o.object_id(+) AND s.username is NOT NULL
