sql server在执行查询语句时会锁表.在锁表期间禁止增删改操作. 如果不想锁表,那就再表名或别名后面加上WITH(NOLOCK) 如下所示:…

有时候系统很慢,有可能是SQL Server数据库中某些表被锁定 --查看被锁表(需查多几次,有些临时锁很快会自动解锁): SELECT request_session_id AS spid, OBJECT_NAME(resource_associated_entity_id) AS tableName FROM sys.dm_tran_locks WHERE resource_type='OBJECT' --spid 锁表进程 --tableName 被锁表名 -- 解锁: DECLARE @…

--查询已锁的表 select request_session_id spid,OBJECT_NAME(resource_associated_entity_id) tableName ,* from sys.dm_tran_locks where resource_type='OBJECT' --解锁表(@spid) declare @spid int Set @spid = 62 --锁表进程 declare @sql varchar(1000) set @sql='kill '+cast(…

-- 查询被锁的表select   request_session_id   spid,OBJECT_NAME(resource_associated_entity_id) tableName   from   sys.dm_tran_locks where resource_type='OBJECT' -- 解锁表declare @spid intSet @spid = 113 --锁表进程declare @sql varchar(1000)set @sql='kill '+cast(@spi…

--查看锁表: select request_session_id spid,OBJECT_NAME(resource_associated_entity_id) tableName from sys.dm_tran_locks where resource_type='OBJECT' --解锁: declare @spid int Set @spid = 57 --锁表进程 declare @sql varchar(1000) set @sql='kill '+cast(@spid as va…

SELECT 表名 then d.name else '' end, 表说明 then isnull(f.value,'') else '' end, 字段序号=a.colorder, 字段名=a.name, 标识 then '√'else '' end, 主键 FROM sysobjects where xtype='PK' and name in ( SELECT name FROM sysindexes WHERE indid in( SELECT indid FROM sysindexk…

一.查询数据库(sys.databases —— select *from sys.databases where name='<数据库名>') select *from sys.databases where name='MyDatabase' 二.查询表(sysobjects —— select *from sysobjects where id=OBJECT_ID('<表名>')) select *from sysobjects where id=OBJECT_ID('Stu…

a) 插入新表 select * into newtable from table b) 插入已经存在的表 insert into table select * from table2 where...…

;with cte as ( select * from Associator where No = 'mc1007' union all select air.* from Associator as air inner join cte on air.ParentNo = cte.No ) select * from cte;…

select object_name(id) tablename, 8*reserved/1024 reserved, rtrim(8*dpages)+'kb' used, 8*(reserved-dpages)/1024 unused, 8*dpages/1024-rows/1024*minlen/1024 free, rows --,* from sysindexes where indid=1 order by tablename,reserved desc…