一些SQL整理

统计SQL执行时间和次数的语句：

SELECT top 50

qt.text AS SQL_text ,

SUM(qs.total_worker_time) AS total_cpu_time,

SUM(qs.execution_count) AS total_execution_count,

SUM(qs.total_worker_time)/SUM(qs.execution_count) AS avg_cpu_time,

COUNT(*) AS number_of_statements

FROM sys.dm_exec_query_stats qs

CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) as qt

GROUP BY qt.text

ORDER BY avg_cpu_time DESC --统计总的CPU时间 total_cpu_time

查询所有表的数据量

SELECT   a.name, b.rows

FROM      sysobjects AS a INNER JOIN

                 sysindexes AS b ON a.id = b.id

WHERE   (a.type = ‘u‘) AND (b.indid IN (0, 1))

ORDER BY b.rows DESC

清除LOG

USE [master]

GO

ALTER DATABASE dbname SET RECOVERY SIMPLE WITH NO_WAIT

GO

ALTER DATABASE dbname SET RECOVERY SIMPLE

GO

USE dbname

GO

DBCC SHRINKFILE (N‘dbname_Log‘ , 0,TRUNCATEONLY)

GO

一些SQL整理,码迷,mamicode.com