mssql锁表、查询被锁表、解锁被锁表的相关语句

-- 锁表（其它事务不能读、更新、删除）
BEGIN TRAN
SELECT * FROM <表名> WITH(TABLOCKX);
WAITFOR delay ‘00:00:20‘
COMMIT TRAN

-- 锁表（其它事务只能读，不能更新、删除）
BEGIN TRAN
SELECT * FROM <表名> WITH(HOLDLOCK);
WAITFOR delay ‘00:00:20‘
COMMIT TRAN

-- 锁部分行
BEGIN TRAN
SELECT * FROM <表名>WITH(XLOCK) WHERE ID IN (‘81A2EDF9-D1FD-4037-A17B-1369FD3B169B‘);
WAITFOR delay ‘00:01:20‘
COMMIT TRAN

-- 查看被锁表
select request_session_id 锁表进程, OBJECT_NAME(resource_associated_entity_id) 被锁表名  
from sys.dm_tran_locks where resource_type = ‘OBJECT‘;

-- 解锁
declare @spid  int
Set @spid  = 66 -- 锁表进程
declare @sql varchar(1000)
set @sql = ‘kill ‘ + cast(@spidas varchar)
exec(@sql)