--以下几个为相关表
SELECT * FROM v$lock; SELECT * FROM v$sqlarea; SELECT * FROM v$session; SELECT * FROM v$process ; SELECT * FROM v$locked_object; SELECT * FROM all_objects; SELECT * FROM v$session_wait;
--查看被锁的表
select b.owner,b.object_name,a.session_id,a.locked_mode from v$locked_object a,dba_objects b where b.object_id = a.object_id;
--查看那个用户那个进程照成死锁
select b.username,b.sid,b.serial#,logon_time from v$locked_object a,v$session b where a.session_id = b.sid order by b.logon_time;
--查看连接的进程
SELECT sid, serial#, username, osuser FROM v$session;
--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;
这个语句将查找到数据库中所有的DML语句产生的锁,还可以发现,
任何DML语句其实产生了两个锁,一个是表锁,一个是行锁。
--杀掉进程 sid,serial#
alter system kill session '210,11562'; 此处不能连接起来 要有空格,不然会报错的例如(alter system kill session'210,11562'; )。