SQL Server 数据库部分常用语句小结

Posted 2021-01-06 东山絮柳仔

1. 查询某存储过程的访问情况

SELECT TOP 1000 db_name(d.database_id) as DBName, s.name as 存储名字, s.type_desc as 存储类型,
d.cached_time as SP添加到缓存的时间, d.last_execution_time AS 上次执行SP的时间,
d.last_elapsed_time as [上次执行SP所用的时间(微秒)], d.total_elapsed_time [完成此SP的执行所用的总时间(微秒)],
d.total_elapsed_time/d.execution_count AS [平均执行时间(微秒)], d.execution_count as 自上次编译以来所执行的次数
FROM sys.procedures s INNER JOIN sys.dm_exec_procedure_stats d
ON s.object_id = d.object_id where s.name=‘存储过程的名称‘  ----请在此处替换要统计的SP
ORDER BY d.total_elapsed_time/d.execution_count DESC

 

2. 查询包含关键字（字符串）的存储过程 SP

Select distinct o.* from sysobjects o, syscomments s
where o.xtype=‘P‘ and s.id=o.id and text like ‘%关键字%‘ order by o.name

 

3. 查询包含关键字（字符串）的Job 

Select * from msdb.dbo.sysjobs
where job_id in(Select job_id from msdb.dbo.sysjobsteps where command like ‘%XXXXXX%‘ )

 

4. 查询哪些SQL语句占用CPU的频率高

SELECT TOP 10 [cpu_time],
[session_id],
[request_id],
[start_time] AS ‘开始时间‘,
[status] AS ‘状态‘,
[command] AS ‘命令‘,
dest.[text] AS ‘sql语句‘,
DB_NAME([database_id]) AS ‘数据库名‘,
[blocking_session_id] AS ‘正在阻塞其他会话的会话ID‘,
[wait_type] AS ‘等待资源类型‘,
[wait_time] AS ‘等待时间‘,
[wait_resource] AS ‘等待的资源‘,
[reads] AS ‘物理读次数‘,
[writes] AS ‘写次数‘,
[logical_reads] AS ‘逻辑读次数‘,
[row_count] AS ‘返回结果行数‘
FROM sys.[dm_exec_requests] AS der
CROSS APPLY
sys.[dm_exec_sql_text](der.[sql_handle]) AS dest
WHERE [session_id]>50 AND DB_NAME(der.[database_id])=‘数据库名字‘  ----请在此处输入要统计的数据库名字
ORDER BY [cpu_time] DESC

 

5. DB的单用户模式更新成多用户模式
alter database 数据库名字 set multi_user;

 

6. 查询某表的列的详情
select * from syscolumns where id=object_id(‘要统计的表‘) ---请替换

 

7. 查询当前SQL Server日志信息 

Exec xp_readerrorlog 0

其实 xp_readerrorlog 一共有7个参数

（1）   存档编号；

（2）  日志类型(1为SQL Server日志,2为SQL Agent日志)；

（3）  查询包含的字符串；

（4）  查询包含的字符串；

（5）  LogDate开始时间；

（6）  结果排序,按LogDate排序(可以为降序"Desc" Or 升序"Asc")；

（7） 结果排序,按LogDate排序(可以为降序"Desc" Or 升序"Asc") 。

 

8. 查询Job 明细

SELECT b.[name] [JobName]
,b.enabled [Enabled]
,a.step_id [StepID]
,b.description [JobDescription]
,a.step_name [StepName]
,a.command [Script]
FROM msdb.dbo.sysjobsteps a
INNER JOIN msdb.dbo.sysjobs b
ON a.job_id=b.job_id