DBCC Page 初窥

 

demo  表数据如下

 

 

id       NAME
1        beijing

--sesson 1                                                                                     ---session 2

 

BEGIN TRAN
UPDATE kaka SET NAME ='shanghai' WHERE id='1'                           SELECT  * FROM kaka

 查看锁详细信息

-----SELECT * FROM sys.dm_tran_locks dtl  WHERE dtl.request_session_id IN (64,63)

  resource_description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   1:303                                                                                                                                                                                                                                                            1:303                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              (010086470766)                                                                                                                                                                                                                                                   (010086470766)      

--查看页信息

 

dbcc traceon(3064)
DBCC PAGE (7,1,303,3) WITH TABLERESULTS

010086470766 是对应  KeyHashValue值，进而定位具体的row

--  也可以根据此动态视图查询，KEY，PAGE,TABLE的关联信息

SELECT object_name(object_id), *
FROM sys.partitions
WHERE hobt_id=010086470766

SQLServer 数据库镜像+复制切换方案

 http://www.sweiku.com/sqlserver-database-mirror-copy-switch-programme.html

   

3.

    DECLARE @SQL VARCHAR(8000)  
        
     SELECT  @SQL = COALESCE(@SQL, '') + 'Kill ' + CAST(spid AS VARCHAR(10)) + '; '  
     FROM    sys.sysprocesses  
     WHERE   DBID = DB_ID('AdventureWorks')  
        
     PRINT @SQL --EXEC(@SQL) Replace the print statement with exec to execute  

　　

COALESCE 函数作用：１，返回参数中非ＮＵＬＬ值。　　　２　行列置换