一、oracle查看被锁的表和解锁

1.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;

2.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;

3.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;

4.查看连接的进程 

SELECT sid, serial#, username, osuser FROM v$session;

5.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。

6.杀掉进程 sid,serial#

alter system kill session'210,11562';

二、SqlServer查看被锁的表以及解锁

1.查看被锁表：

select spId
  from master..SysProcesses
 where db_Name(dbID) = '数据库名称'
   and spId <> @@SpId
   and dbID <> 0

2.解除锁：

exec ('Kill '+cast(@spid  as varchar))

3.查看被锁表：

select   request_session_id   spid,OBJECT_NAME(resource_associated_entity_id) tableName   
from   sys.dm_tran_locks where resource_type='OBJECT'

spid 锁表进程
tableName 被锁表名

4.解锁：

declare @spid  int 
Set @spid  = 57 --锁表进程
declare @sql varchar(1000)
set @sql='kill '+cast(@spid  as varchar)
exec(@sql)

show status like ‘%lock%;

show OPEN TABLES where In_use > 0; 这个语句记录当前锁表状态

show processlist 查询表被锁进程
查询到相应进程kill id

查看正在锁的事物：
SELECT * FROM INFORMATION_SCHEMA.INNODB_LOCKS.
查看等待锁的事物：
SELECT * FROM INFORMATION_SCHEMA.INNODB_LOCK_WAITS.

kill 12041