SQL Server日常维护常用的一些脚本整理。

1.sql server开启clr权限：

exec sp_configure 'clr enabled', 1GORECONFIGUREGOALTER DATABASE HWMESTC SET TRUSTWORTHY ONALTER AUTHORIZATION ON Database::HWMESTC TO sa;

2.查询数据库大小

Exec sp_spaceusedselect name, convert(float,size) * (8192.0/1024.0)/1024. from dbo.sysfiles

3.数据库日志压缩

--选择需要使用的数据库USE PIMS--将数据库模式设置为SIMPLEALTER DATABASE PIMS SET RECOVERY SIMPLE-- 将日志文件收缩到1M DBCC SHRINKFILE ('PIMS_log', 1)-- 还原数据库ALTER DATABASE PIMS SET RECOVERY FULL

4.查看数据库连接用户

Select * From sys.dm_exec_connections

5.查看当前占用 cpu 资源最高的会话和其中执行的语句(及时CPU)

select spid,cmd,cpu,physical_io,memusage,(select top 1 [text] from ::fn_get_sql(sql_handle)) sql_textfrom master..sysprocesses order by cpu desc,physical_io desc

6.查看缓存中重用次数少，占用内存大的查询语句（当前缓存中未释放的）--全局

SELECT TOP 100 usecounts, objtype, p.size_in_bytes,[sql].[text] FROM sys.dm_exec_cached_plans p OUTER APPLY sys.dm_exec_sql_text (p.plan_handle) sql ORDER BY usecounts,p.size_in_bytes  desc

7.看BUFFER POOL中，都缓存了哪些表(当前数据库)的数据

select OBJECT_NAME(object_id) 表名,COUNT(*) 页数,COUNT(*)*8/1024.0 Mb                              from   sys.dm_os_buffer_descriptors a,sys.allocation_units b,sys.partitions c                              where  a.allocation_unit_id=b.allocation_unit_id          and b.container_id=c.hobt_id                    and database_id=DB_ID()                              group by OBJECT_NAME(object_id)                           order by 2 desc  

8.查询SQLSERVER内存使用情况

select * from sys.dm_os_process_memory

9.查询SqlServer总体的内存使用情况

select      type,sum(virtual_memory_reserved_kb)*0.1*10/1024/1024 as vm_Reserved_gb,--保留的内存  sum(virtual_memory_committed_kb)*0.1*10/1024/1024 as vm_Committed_gb,--提交的内存  sum(awe_allocated_kb)*0.1*10/1024/1024 as awe_Allocated_gb,--开启AWE后使用的内存  sum(shared_memory_reserved_kb)*0.1*10/1024/1024 as sm_Reserved_gb,--共享的保留内存  sum(shared_memory_committed_kb)*0.1*10/1024/1024 as sm_Committed_gb--共享的提交内存  from    sys.dm_os_memory_clerksgroup by typeorder by type

10.查询当前数据库缓存的所有数据页面，哪些数据表，缓存的数据页面数量

-- 查询当前数据库缓存的所有数据页面，哪些数据表，缓存的数据页面数量-- 从这些信息可以看出，系统经常要访问的都是哪些表，有多大？select p.object_id, object_name=object_name(p.object_id), p.index_id, buffer_pages=count(*) from sys.allocation_units a,     sys.dm_os_buffer_descriptors b,     sys.partitions p where a.allocation_unit_id=b.allocation_unit_id     and a.container_id=p.hobt_id     and b.database_id=db_id()group by p.object_id,p.index_id order by buffer_pages desc 

11.查询缓存的各类执行计划，及分别占了多少内存

-- 查询缓存的各类执行计划，及分别占了多少内存-- 可以对比动态查询与参数化SQL（预定义语句）的缓存量select    cacheobjtype        , objtype        , sum(cast(size_in_bytes as bigint))/1024 as size_in_kb        , count(bucketid) as cache_countfrom    sys.dm_exec_cached_plansgroup by cacheobjtype, objtypeorder by cacheobjtype, objtype

12.查询缓存中具体的执行计划，及对应的SQL

-- 查询缓存中具体的执行计划，及对应的SQL-- 将此结果按照数据表或SQL进行统计，可以作为基线，调整索引时考虑-- 查询结果会很大，注意将结果集输出到表或文件中SELECT  usecounts ,        refcounts ,        size_in_bytes ,        cacheobjtype ,        objtype ,        TEXTFROM    sys.dm_exec_cached_plans cp        CROSS APPLY sys.dm_exec_sql_text(plan_handle)ORDER BY objtype DESC ;GO

13.查询sql server内存整体使用情况

--查询sql server内存整体使用情况  SELECT object_name, cntr_value*0.1*10/1024/1024 ,cntr_value,cntr_type,t.counter_name,t.instance_name  FROM sys.dm_os_performance_counters t  WHERE counter_name = 'Total Server Memory (KB)';

14.一次性清除数据库所有表的数据

CREATE PROCEDURE sp_DeleteAllData  AS  EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL'  EXEC sp_MSForEachTable 'ALTER TABLE ? DISABLE TRIGGER ALL'  EXEC sp_MSForEachTable 'DELETE FROM ?'  EXEC sp_MSForEachTable 'ALTER TABLE ? CHECK CONSTRAINT ALL'  EXEC sp_MSForEachTable 'ALTER TABLE ? ENABLE TRIGGER ALL'  EXEC sp_MSFOREACHTABLE 'SELECT * FROM ?'  GO  

15.SQL优化相关、执行时间

SELECT creation_time  N'语句编译时间'          ,last_execution_time  N'上次执行时间'          ,total_physical_reads N'物理读取总次数'          ,total_logical_reads/execution_count N'每次逻辑读次数'          ,total_logical_reads  N'逻辑读取总次数'          ,total_logical_writes N'逻辑写入总次数'          ,execution_count  N'执行次数'          ,total_worker_time/1000 N'所用的CPU总时间ms'          ,total_elapsed_time/1000  N'总花费时间ms'          ,(total_elapsed_time / execution_count)/1000  N'平均时间ms'          ,SUBSTRING(st.text, (qs.statement_start_offset/2) + 1,           ((CASE statement_end_offset             WHEN -1 THEN DATALENGTH(st.text)            ELSE qs.statement_end_offset END               - qs.statement_start_offset)/2) + 1) N'执行语句'  FROM sys.dm_exec_query_stats AS qs  CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) st  WHERE SUBSTRING(st.text, (qs.statement_start_offset/2) + 1,           ((CASE statement_end_offset             WHEN -1 THEN DATALENGTH(st.text)            ELSE qs.statement_end_offset END               - qs.statement_start_offset)/2) + 1) NOT LIKE '%fetch%'  ORDER BY  total_elapsed_time / execution_count DESC;  

16.truncate外键表存储过程

USE PIMSGOCREATE PROCEDURE [dbo].[usp_Truncate_Table]  @TableToTruncate VARCHAR(64)AS BEGINSET NOCOUNT ON--==变量定义DECLARE @i intDECLARE @Debug bitDECLARE @Recycle bitDECLARE @Verbose bitDECLARE @TableName varchar(80)DECLARE @ColumnName varchar(80)DECLARE @ReferencedTableName varchar(80)DECLARE @ReferencedColumnName varchar(80)DECLARE @ConstraintName varchar(250)DECLARE @CreateStatement varchar(max)DECLARE @DropStatement varchar(max)   DECLARE @TruncateStatement varchar(max)DECLARE @CreateStatementTemp varchar(max)DECLARE @DropStatementTemp varchar(max)DECLARE @TruncateStatementTemp varchar(max)DECLARE @Statement varchar(max) SET @Debug = 0--(0:将执行相关语句|1:不执行语句) SET @Recycle = 0--(0:不创建/不清除存储表|1:将创建/清理存储表) set @Verbose = 1--(1:每步执行均打印消息|0:不打印消息) SET @i = 1    SET @CreateStatement = 'ALTER TABLE [dbo].[<tablename>]  WITH NOCHECK ADD  CONSTRAINT [<constraintname>] FOREIGN KEY([<column>]) REFERENCES [dbo].[<reftable>] ([<refcolumn>])'    SET @DropStatement = 'ALTER TABLE [dbo].[<tablename>] DROP CONSTRAINT [<constraintname>]'    SET @TruncateStatement = 'TRUNCATE TABLE [<tablename>]'-- 创建外键临时表IF OBJECT_ID('tempdb..#FKs') IS NOT NULL    DROP TABLE #FKs-- 获取外键SELECT ROW_NUMBER() OVER (ORDER BY OBJECT_NAME(parent_object_id), clm1.name) as ID,       OBJECT_NAME(constraint_object_id) as ConstraintName,       OBJECT_NAME(parent_object_id) as TableName,       clm1.name as ColumnName,        OBJECT_NAME(referenced_object_id) as ReferencedTableName,       clm2.name as ReferencedColumnName  INTO #FKs  FROM sys.foreign_key_columns fk       JOIN sys.columns clm1 ON fk.parent_column_id = clm1.column_id AND fk.parent_object_id = clm1.object_id       JOIN sys.columns clm2 ON fk.referenced_column_id = clm2.column_id AND fk.referenced_object_id= clm2.object_id --WHERE OBJECT_NAME(parent_object_id) not in ('//tables that you do not wont to be truncated') WHERE OBJECT_NAME(referenced_object_id) = @TableToTruncate ORDER BY OBJECT_NAME(parent_object_id)-- 外键操作(删除|重建)表IF Not EXISTS(SELECT 1 FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = 'Internal_FK_Definition_Storage')BEGIN    IF @Verbose = 1        PRINT '1. 正在创建表(Internal_FK_Definition_Storage)...'    CREATE TABLE [Internal_FK_Definition_Storage]     (        ID int not null identity(1,1) primary key,        FK_Name varchar(250) not null,        FK_CreationStatement varchar(max) not null,        FK_DestructionStatement varchar(max) not null,        Table_TruncationStatement varchar(max) not null    ) END ELSEBEGIN    IF @Recycle = 0    BEGIN        IF @Verbose = 1        PRINT '1. 正在清理表(Internal_FK_Definition_Storage)...'        TRUNCATE TABLE [Internal_FK_Definition_Storage]        END    ELSE        PRINT '1. 正在清理表(Internal_FK_Definition_Storage)...'ENDIF @Recycle = 0BEGIN    IF @Verbose = 1        PRINT '2. 正在备份外键定义...'               WHILE (@i <= (SELECT MAX(ID) FROM #FKs))    BEGIN        SET @ConstraintName = (SELECT ConstraintName FROM #FKs WHERE ID = @i)        SET @TableName = (SELECT TableName FROM #FKs WHERE ID = @i)        SET @ColumnName = (SELECT ColumnName FROM #FKs WHERE ID = @i)        SET @ReferencedTableName = (SELECT ReferencedTableName FROM #FKs WHERE ID = @i)        SET @ReferencedColumnName = (SELECT ReferencedColumnName FROM #FKs WHERE ID = @i)        SET @DropStatementTemp = REPLACE(REPLACE(@DropStatement,'<tablename>',@TableName),'<constraintname>',@ConstraintName)        SET @CreateStatementTemp = REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(@CreateStatement,'<tablename>',@TableName),'<column>',@ColumnName),'<constraintname>',@ConstraintName),'<reftable>',@ReferencedTableName),'<refcolumn>',@ReferencedColumnName)        SET @TruncateStatementTemp = REPLACE(@TruncateStatement,'<tablename>',@TableName)         INSERT INTO [Internal_FK_Definition_Storage]        SELECT @ConstraintName, @CreateStatementTemp, @DropStatementTemp, @TruncateStatementTemp                SET @i = @i + 1                IF @Verbose = 1            PRINT '  > 已备份外键:[' + @ConstraintName + '] 所属表: [' + @TableName + ']'    END   END   ELSE     PRINT '2. 正在备份外键定义...'IF @Verbose = 1    PRINT '3. 正在删除外键...'BEGIN TRAN    BEGIN TRYSET @i = 1WHILE (@i <= (SELECT MAX(ID) FROM [Internal_FK_Definition_Storage]))BEGIN    SET @ConstraintName = (SELECT FK_Name FROM [Internal_FK_Definition_Storage] WHERE ID = @i)    SET @Statement = (SELECT FK_DestructionStatement FROM [Internal_FK_Definition_Storage] WITH (NOLOCK) WHERE ID = @i)    IF @Debug = 1         PRINT @Statement    ELSE        EXEC(@Statement)    SET @i = @i + 1    IF @Verbose = 1        PRINT '  > 已删除外键:[' + @ConstraintName + ']'END     IF @Verbose = 1    PRINT '4. 正在清理数据表...'--先清除该外键所在表(由于外键所在表仍可能又被其他外键所引用，因此需要循环递归处理)(注：本处理未实现)--请不要使用下面注释代码/*    SET @i = 1WHILE (@i <= (SELECT MAX(ID) FROM [Internal_FK_Definition_Storage]))BEGIN    SET @Statement = (SELECT Table_TruncationStatement FROM [Internal_FK_Definition_Storage] WHERE ID = @i)    IF @Debug = 1         PRINT @Statement    ELSE        EXEC(@Statement)    SET @i = @i + 1    IF @Verbose = 1        PRINT '  > ' + @StatementEND*/IF @Debug = 1     PRINT 'TRUNCATE TABLE [' + @TableToTruncate + ']'ELSE    EXEC('TRUNCATE TABLE [' + @TableToTruncate + ']')IF @Verbose = 1    PRINT '  > 已清理数据表[' + @TableToTruncate + ']'    IF @Verbose = 1    PRINT '5. 正在重建外键...'SET @i = 1WHILE (@i <= (SELECT MAX(ID) FROM [Internal_FK_Definition_Storage]))BEGIN    SET @ConstraintName = (SELECT FK_Name FROM [Internal_FK_Definition_Storage] WHERE ID = @i)    SET @Statement = (SELECT FK_CreationStatement FROM [Internal_FK_Definition_Storage] WHERE ID = @i)    IF @Debug = 1         PRINT @Statement    ELSE        EXEC(@Statement)    SET @i = @i + 1    IF @Verbose = 1    PRINT '  > 已重建外键:[' + @ConstraintName + ']'END    COMMITEND TRYBEGIN CATCH    ROLLBACK     PRINT '出错信息:'+ERROR_MESSAGE()END CATCHIF @Verbose = 1    PRINT '6. 处理完成！'END

17. 查看job运行持续时间

SELECT      [T1].[job_id]    ,[T1].[name] AS [job_name]     ,[T2].[run_status]    ,[T2].[run_date]    ,[T2].[run_time]    ,[dbo].[agent_datetime]([T2].[run_date], [T2].[run_time]) AS [run_datetime]    ,[T2].[run_duration]    ,DATEDIFF(SECOND, '1900-01-01', DATEADD(SECOND, 31, [dbo].[agent_datetime](19000101, [run_duration]))) AS [run_duration_s]FROM     [dbo].[sysjobs] AS T1    INNER JOIN [dbo].[sysjobhistory] AS T2        ON [T2].[job_id] = [T1].[job_id]WHERE     [T1].[enabled] = 1    AND [T2].[step_id] = 0    AND [T2].[run_duration] >= 1    and [T1].[name]='PIMS_CreatePaperCraftParameterAnalysisData'ORDER BY     [T2].[job_id] ASC    ,[T2].[run_date] ASCGO

18. 从所有缓存中释放所有未使用的缓存条目

DBCC FREESYSTEMCACHE('ALL');

19. 查询、解除死锁

--查询表死锁信息select object_name(resource_associated_entity_id) as tableName, request_session_id as pid from sys.dm_tran_lockswhere resource_type = 'OBJECT'dbcc opentran--查看死锁的详细信息、执行的sql语句exec sp_who2 53--exec sp_who 53 DBCC inputbuffer (53)--解除死锁kill 53

20. 查询SQL Server根据CPU消耗列出前5个最差性能的查询

-- Worst performing CPU bound queriesSELECT TOP 5    st.text,    qp.query_plan,    qs.*FROM sys.dm_exec_query_stats qsCROSS APPLY sys.dm_exec_sql_text(qs.plan_handle) stCROSS APPLY sys.dm_exec_query_plan(qs.plan_handle) qpORDER BY total_worker_time DESCGO

21. 显示如何依据I/O消耗来找出你性能最差的查询

-- Worst performing I/O bound queriesSELECT TOP 5    st.text,    qp.query_plan,    qs.*FROM sys.dm_exec_query_stats qsCROSS APPLY sys.dm_exec_sql_text(qs.plan_handle) stCROSS APPLY sys.dm_exec_query_plan(qs.plan_handle) qpORDER BY total_logical_reads DESCGO

22. 查询服务器部分特殊信息

select SERVERPROPERTY(N'edition') as Edition     --数据版本，如企业版、开发版等    ,SERVERPROPERTY(N'collation') as Collation   --数据库字符集    ,SERVERPROPERTY(N'servername') as ServerName --服务名    ,@@VERSION as Version   --数据库版本号    ,@@LANGUAGE AS Language  --数据库使用的语言，如us_english等

23.查询数据库中各数据表大小

-- =============================================-- 描  述：更新查询数据库中各表的大小，结果存储到数据表中-- =============================================    --查询是否存在结果存储表    IF NOT EXISTS (SELECT * FROM sysobjects where id = OBJECT_ID(N'temp_tableSpaceInfo') AND OBJECTPROPERTY(id, N'IsUserTable') = 1)    BEGIN        --不存在则创建        CREATE TABLE temp_tableSpaceInfo        (name NVARCHAR(128),         rows char(11),         reserved VARCHAR(18),        data VARCHAR(18),        index_size VARCHAR(18),        unused VARCHAR(18))    END    --清空数据表    DELETE FROM temp_tableSpaceInfo    --定义临时变量在遍历时存储表名称    DECLARE @tablename VARCHAR(255)    --使用游标读取数据库内所有表表名    DECLARE table_list_cursor CURSOR FOR     SELECT name FROM sysobjects     WHERE OBJECTPROPERTY(id, N'IsTable') = 1 AND name NOT LIKE N'#%%' ORDER BY name    --打开游标    OPEN table_list_cursor    --读取第一条数据    FETCH NEXT FROM table_list_cursor INTO @tablename     --遍历查询到的表名    WHILE @@FETCH_STATUS = 0    BEGIN        --检查当前表是否为用户表        IF EXISTS (SELECT * FROM sysobjects WHERE id = OBJECT_ID(@tablename) AND OBJECTPROPERTY(id, N'IsUserTable') = 1)        BEGIN            --当前表则读取其信息插入到表格中            EXECUTE sp_executesql N'INSERT INTO temp_tableSpaceInfo EXEC sp_spaceused @tbname', N'@tbname varchar(255)', @tbname = @tablename        END        --读取下一条数据        FETCH NEXT FROM table_list_cursor INTO @tablename     END    --释放游标    CLOSE table_list_cursor    DEALLOCATE table_list_cursor    SELECT *,replace(reserved,'KB','')/1024 数据表大小M FROM temp_tableSpaceInfo order by replace(reserved,'KB','')/1024 desc    drop table temp_tableSpaceInfo

24.压缩数据库、文件、日志

DBCC ShrinkFile(‘数据库名’,  targetsize);            /* 收缩数据库文件 */DBCC ShrinkFile(‘数据库名_log’,  targetsize);        /* 收缩日志文件 */Targetsize：单位为兆，必须为整数，DBCC SHRINKFILE 尝试将文件收缩到指定大小。DBCC SHRINKFILE 不会将文件收缩到小于“实际使用的空间”大小，例如“分配空间”为10M，“实际使用空间”为6M，当制定targetsize为1时，则将该文件收缩到6M，不会将文件收缩到1M。--收缩数据库DBCC SHRINKDATABASE(数据库名，百分比)百分比：即“收缩后文件中的最大可用空间”，取值范围“大于等于0， 小于100%”，实际使用中设为0即可。

25.用扩展时间抓取过去的死锁信息

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26.数据库对象信息检索

--查看对象的说明信息exec sp_help 'T_papermachine'--显示视图、存储过程、函数、触发器的定义脚本。 exec sp_helptext 'proc_report_getmeasuredata' --显示表的行数和占用空间。  exec sp_spaceused  'T_papermachine'--显示表或视图的前100行，选定“tablename,1000”按Ctrl+F1可显示表的前1000行。exec sp_executesql N'IF OBJECT_ID(@tablename) IS NOT NULL EXEC(N''SELECT TOP(''+@n+N'') * FROM ''+@tablename)',N'@tablename nvarchar(100)=''t_papermachine'',@n int=100' --显示表中每个索引占用的空间。  exec sp_executesql N'SELECT index_name = ind.name, ddps.used_page_count, ddps.reserved_page_count, ddps.row_count FROM sys.indexes ind INNER JOIN sys.dm_db_partition_stats ddps ON ind.object_id = ddps.object_id AND ind.index_id = ddps.index_id WHERE ind.object_id = OBJECT_ID(@tablename)',N'@tablename nvarchar(100)=''t_papermachine''' --显示表或视图的字段名，以逗号分隔。  exec sp_executesql N'SELECT columns = STUFF((SELECT '', ''+name FROM sys.columns WHERE object_id = OBJECT_ID(@tablename) FOR XML PATH('''')),1,2,'''')',N'@tablename nvarchar(100)=''T_Papermachine''' --根据选定关键词在当前数据库中查找表、视图、存储过程、函数  exec sp_executesql N'SELECT * FROM sys.objects WHERE type IN (''U'',''V'',''P'',''FN'') AND name LIKE ''%''+@keyword+''%'' ORDER BY type,name',N'@keyword nvarchar(50)=''machine'''  --查询数据库中包含指定关键词的表、视图、存储过程、函数select routine_name,routine_definition,routine_typefrom information_schema.routineswhere routine_definition like '%AssessmentSpeed%'order by routine_type--模糊查询存储过程sql中包含某个文本SELECT obj.Name 存储过程名, sc.TEXT 存储过程内容FROM syscomments scINNER JOIN sysobjects obj ON sc.Id = obj.IDWHERE sc.TEXT LIKE '%存储过程内容%'

27.数据库用户、权限操作

USE [master]GO--待确认账号密码CREATE LOGIN [NDIT] WITH PASSWORD=N'1', DEFAULT_DATABASE=[PIMS], CHECK_EXPIRATION=OFF, CHECK_POLICY=OFFGOUSE PIMSgoCREATE USER [NDIT] FOR LOGIN [NDIT]GO--大权限， 如果是指定的部分表，不执行这个，如果是所有内容都可以读，用此脚本--EXEC sp_addrolemember N'db_datareader', N'NDIT'--GO--指定特定表名赋予新增/更新/查询DECLARE @Sql NVARCHAR(max)SET @Sql=''--table--SELECT @Sql=@Sql+'GRANT INSERT,UPDATE,SELECT ON ['+a.name+'] TO [NDIT];' FROM sys.tables AS a WHERE name IN ('Tab1','Tab2');--view--SELECT @Sql=@Sql+'GRANT INSERT,UPDATE,SELECT ON ['+a.name+'] TO [NDIT];' FROM sys.views AS a WHERE name IN ('view1','view2');--procedure--SELECT @Sql=@Sql+'GRANT INSERT,UPDATE,SELECT ON ['+a.name+'] TO [NDIT];' FROM sys.procedures AS a WHERE name IN ('proc1','proc2');PRINT @SqlEXEC(@Sql)go--禁用登陆帐户alter login NDIT disable--启用登陆帐户alter login NDIT enable--登陆帐户改名alter login NDIT with name=dba_tom--登陆帐户改密码： alter login NDIT with password='aabb@ccdd'--数据库用户改名： alter user NDIT with name=dba_tom--更改数据库用户 defult_schema： alter user NDIT with default_schema=sales--删除数据库用户： drop user NDIT--删除 SQL Server登陆帐户： drop login NDIT

28.使用Checksum结合NewID获得随机数

Create FUNCTION Scalar_CheckSumNEWID  (      @From int,      @To int,      @Keep int,      @newid varchar(50)  )  RETURNS float  BEGIN      DECLARE @ResultVar float      SELECT @ResultVar=CONVERT(BIGINT,RIGHT(ABS(CHECKSUM(@newid)),9))*0.1/100000000      RETURN @From+round((@To-@From)*@ResultVar,@Keep)  END  GO  

29. 查询数据库表字段各项属性信息，便于直接复制导出excel表

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30. 判断是否存在数据库、表、列、视图

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31. CTE查询的存储过程执行时间明显超出T-Sql查询。 可以通过添加“WITH RECOMPILE”参数，强制存储过程每次执行时重编译，实现快速查询。

大神的帖子： Parameter Sniffing, Embedding, and the RECOMPILE Options

32. 解决insert exec 嵌套问题，解决办法是建立一个指向自己的数据库，增加链接服务器。

--1. 首先，增加链接服务器：   exec sp_addlinkedserver 'srv1','','SQLOLEDB','(local)'      exec sp_addlinkedsrvlogin 'srv1','false',null,'sa','sa'--2. 其次找到该链接服务器，右键属性，开启RPC：   服务器对象->链接服务器->右键->属性->服务器选项->RPC、RPC Out 都设置为True--3. 启动MSDTC服务：  服务名称为：MSDTC（显示名称为Distributed Transaction Coordinator）

  如果没启动会报错如下：MSDTC on server 'servername' is unavailable --4. 调整存储过程访问，使用srv1调用存储过程   insert #Temp exec srv1.DBName.dbo.Proc_Test @param --5. 成功！结束！

33. 查询数据库连接数、用户等

--查看连接到数据库"DB"的连接SELECT * from master.dbo.sysprocesses WHERE dbid = DB_ID('DB')--查询某个数据库用户的连接情况sp_who 'sa'--查看数据库允许的最大连接select @@MAX_CONNECTIONS--查看数据库自上次启动以来的连接次数SELECT @@CONNECTIONS--关闭连接，上面的查询可以得到spid，根据spid，关闭进程就可以了。kill 54

34. 数据库缓存清理

CREATE PROCEDURE [dbo].ClearMemory   AS   BEGIN     --清除所有缓存     DBCC DROPCLEANBUFFERS     --打开高级配置     exec sp_configure 'show advanced options', 1     --设置最大内存值，清除现有缓存空间     exec sp_configure 'max server memory', 25600     EXEC ('RECONFIGURE')     --设置等待时间     WAITFOR DELAY '00:00:01'     --重新设置最大内存值     EXEC  sp_configure 'max server memory',40960     EXEC ('RECONFIGURE')     --关闭高级配置     exec sp_configure 'show advanced options',0 ENDGO 

35. sqlcmd命令修改memory

net start MSSQLServer /mSQLCMD /fSQLCMDEXEC sp_configure 'show advanced option', '1'GORECONFIGURE WITH OVERRIDEGOEXEC sp_configure 'max server memory', '40960'GORECONFIGURE WITH OVERRIDEGOgo

36. 数据库还原中。。。

RESTORE DATABASE 数据库名 WITH RECOVERY

37.SQLServer查询所有子节点

用CTE递归;with f as (select * from tab where id=1union allselect a.* from tab as a inner join f as b on a.pid=b.id)select * from f

38.同数据集通过偏移量进行行关联计算

LAG(访问相同结果集的先前行中的数据)、Lead(访问相同结果集的后续行中的数据)

39.列拼接字符串

select stuff((select ';'+namefrom Student for xml path('')),1,1,'') as name

40. 更新函数

EXECUTE sp_refreshsqlmodule N'[dbo].[Proc_Chart]';

41.行转列

Declare @tanks nvarchar(200);Declare @sql nvarchar(4000)set  @tanks=(SELECT STUFF((SELECT ','+tl.UnitCode FROM dbo.V_CP_Tank tl   FOR XML PATH('')),1,1,''))SELECT @tanksSET @sql='    SELECT DataDate,'+@tanks+'    FROM CP_TankMass    PIVOT(sum(RealQuantity) FOR [UnitCode] IN('+@tanks+')) AS T     'Exec(@sql)

42.延时

SQL有定时执行的语句WaitFor。语法格式：waitfor {delay 'time'|time 'time'}delay后面的时间是需要延迟多长时间后执行。time后面的时间是指定何时执行，格式为'HH:MM:SS',不支持日期

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