(1)@@S
SELECT @@CONNECTIONS AS TotalConnections ,@@TIMETICKS AS TimeTicks ,@@CPU_BUSY AS TotalCPUBusyTime ,@@IDLE AS TotalCPUIdleTime ,@@IO_BUSY AS TotalIOBusyTime ,@@PACK_RECEIVED AS TotalReceivedPackets ,@@PACK_SENT AS TotalSentPackets ,@@PACKET_ERRORS AS TotalErrorsInNetworkPackets ,@@TOTAL_READ AS TotalPhysicalReadOperations ,@@TOTAL_WRITE AS TotalWriteOperations ,@@TOTAL_ERRORS AS TotalReadWriteErrors(2)cputime
--必须在master下执行SELECT total_cpu_time, total_execution_count, number_of_statements, s2.text FROM (SELECT TOP 50 SUM(qs.total_worker_time) AS total_cpu_time, SUM(qs.execution_count) AS total_execution_count, COUNT(*) AS number_of_statements, qs.sql_handle FROM sys.dm_exec_query_stats AS qs GROUP BY qs.sql_handle ORDER BY SUM(qs.total_worker_time) DESC) AS stats CROSS APPLY sys.dm_exec_sql_text(stats.sql_handle) AS s2二、selecthighest_cpu_queries.plan_handle, highest_cpu_queries.total_worker_time, q.dbid, q.objectid, q.number, q.encrypted, q.[text]from(select top 50qs.plan_handle, qs.total_worker_timefromsys.dm_exec_query_stats qsorder by qs.total_worker_time desc) as highest_cpu_queriescross apply sys.dm_exec_sql_text(plan_handle) as qorder by highest_cpu_queries.total_worker_time desc(3)IO情况
select b.name,c.name ,c.physical_name,a.num_of_bytes_read,a.num_of_bytes_written,a.io_stall_read_ms,a.io_stall_write_ms,a.io_stall from sys.dm_io_virtual_file_stats (null,null) as a ,sys.databases b, sys.master_files c where a.database_id=b.database_id and a.file_id =c.file_idand a.database_id=c.database_id --挂起的IO请求。select database_id,file_id,io_stall,io_pending_ms_ticks,scheduler_address from sys.dm_io_virtual_file_stats(null,null) t1,sys.dm_io_pending_io_requests t2where t1.file_handle =t2.io_handle如果是SQLServer 2005以上的版本。可以从sys.dm_io_virtual_file_stats查看各个数据库的文件的读写情况。但是只是保存自上次实例启动之后的统计信息。select * from sys.dm_io_virtual_file_stats(null,null)(4)sp_who_lock
create procedure sp_who_lockasbegindeclare @spid int,@bl int,@intTransactionCountOnEntry int, @intRowcount int, @intCountProperties int, @intCounter intcreate table #tmp_lock_who ( id int identity(1,1), spid smallint, bl smallint)IF @@ERROR<>0 RETURN @@ERRORinsert into #tmp_lock_who(spid,bl) select 0 ,blocked from (select * from sysprocesses where blocked>0 ) a where not exists(select * from (select * from sysprocesses where blocked>0 ) b where a.blocked=spid) union select spid,blocked from sysprocesses where blocked>0IF @@ERROR<>0 RETURN @@ERROR -- 找到临时表的记录数select @intCountProperties = Count(*),@intCounter = 1from #tmp_lock_whoIF @@ERROR<>0 RETURN @@ERROR if @intCountProperties=0select '现在没有阻塞和死锁信息' as message-- 循环开始while @intCounter <= @intCountPropertiesbegin-- 取第一条记录select @spid = spid,@bl = blfrom #tmp_lock_who where Id = @intCounter beginif @spid =0 select '引起数据库死锁的是: '+ CAST(@bl AS VARCHAR(10)) + '进程号,其执行的SQL语法如下'else select '进程号SPID：'+ CAST(@spid AS VARCHAR(10))+ '被' + '进程号SPID：'+ CAST(@bl AS VARCHAR(10)) +'阻塞,其当前进程执行的SQL语法如下'DBCC INPUTBUFFER (@bl )end -- 循环指针下移set @intCounter = @intCounter + 1enddrop table #tmp_lock_whoreturn 0end(5)sp_who3
SELECT dess.session_id AS [SPID],CASE der.status WHEN 'background' THEN 'BACKGROUND' ELSE der.status END AS 'Status',CONVERT(varchar(32),dess.original_login_name) AS [Login],ISNULL(dess.host_name,'.') AS [HostName],CASE CONVERT(varchar(12),der.blocking_session_id) WHEN '0' THEN '.'ELSE CONVERT(varchar(12),der.blocking_session_id) END AS BlkBy,DB_NAME(der.database_id) AS DBName,der.command AS 'Command',der.cpu_time AS [CPUTime],der.logical_reads AS [DiskIO],dess.last_request_start_timeAS [LastBatch],ISNULL(dess.program_name,'') AS [ProgramName],ISNULL(dest.text,'') AS 'CurrentQuery',ISNULL(deqp.query_plan,'') AS 'CurrentPlan',rgwg.name AS [ResourceWorkgroupName]FROM sys.dm_exec_requests der INNER JOIN sys.resource_governor_workload_groups rgwg ON der.group_id = rgwg.group_id INNER JOIN sys.dm_exec_sessions dess ON der.session_id = dess.session_idOUTER APPLY sys.dm_exec_sql_text(der.sql_handle) destOUTER APPLY sys.dm_exec_query_plan(der.plan_handle) deqp(6)sqlserver2008 查看内存占用
select type, sum(multi_pages_kb) as [KB] from sys.dm_os_memory_clerks where multi_pages_kb != 0 group by type order by 2 desc(7)sqlserver2008表描述
SELECT 表名=case when a.colorder=1 then d.name else '' end, 表说明=case when a.colorder=1 then isnull(f.value,'') else '' end, 字段序号=a.colorder, 字段名=a.name, 标识=case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end, 主键=case when exists(SELECT 1 FROM sysobjects where xtype='PK' and name in ( SELECT name FROM sysindexes WHERE indid in( SELECT indid FROM sysindexkeys WHERE id = a.id AND colid=a.colid ))) then '√' else '' end, 类型=b.name, 占用字节数=a.length, 长度=COLUMNPROPERTY(a.id,a.name,'PRECISION'), 小数位数=isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0), 允许空=case when a.isnullable=1 then '√'else '' end, 默认值=isnull(e.text,''), 字段说明=isnull(g.[value],'') FROM syscolumns a left join systypes b on a.xusertype=b.xusertype inner join sysobjects d on a.id=d.id and d.xtype='U' and d.name<>'dtproperties' left join syscomments e on a.cdefault=e.id left join sys.extended_properties g on a.id=g.major_id and a.colid=g.minor_id left join sys.extended_properties f on d.id=f.major_id and f.minor_id=0 --where d.name='orders' --如果只查询指定表,加上此条件 order by a.id,a.colorder(8)sqlserver查看阻塞
SELECT blocked_query.session_id AS blocked_session_id, blocking_query.session_id AS blocking_session_id, blocking_sql_text.text AS blocking_sql_text, blocked_sql_text.text AS blocked_sql_text, waits.wait_type AS blocking_resource,blocked_query.command AS blocked_command, blocking_query.command AS blocking_command, blocked_query.wait_type AS blocked_wait_type,blocked_query.wait_time AS blocked_wait_time, blocking_query.total_elapsed_time AS blocking_elapsed_time, GETDATE()FROM sys.dm_exec_requests blocked_query JOIN sys.dm_exec_requests blocking_query ONblocked_query.blocking_session_id = blocking_query.session_idCROSS APPLY(SELECT *FROM sys.dm_exec_sql_text(blocking_query.sql_handle)) blocking_sql_textCROSS APPLY(SELECT *FROM sys.dm_exec_sql_text(blocked_query.sql_handle)) blocked_sql_text JOIN sys.dm_os_waiting_tasks waits ONwaits.session_id = blocking_query.session_id(9)sqlserver查看作业状态
SELECT [sJOB].[job_id] AS [作业ID] , [sJOB].[name] AS [作业名] , CASE WHEN [sJOBH].[run_date] IS NULL OR [sJOBH].[run_time] IS NULL THEN NULL ELSE CAST(CAST([sJOBH].[run_date] AS CHAR(8)) + ' ' + STUFF(STUFF(RIGHT('000000' + CAST([sJOBH].[run_time] AS VARCHAR(6)), 6), 3, 0, ':'), 6, 0, ':') AS DATETIME) END AS [最近执行时间] , CASE [sJOBH].[run_status] WHEN 0 THEN '失败' WHEN 1 THEN '成功' WHEN 2 THEN '重试' WHEN 3 THEN '取消' WHEN 4 THEN '正在运行' -- In Progress END AS [最近执行状态] , STUFF(STUFF(RIGHT('000000' + CAST([sJOBH].[run_duration] AS VARCHAR(6)), 6), 3, 0, ':'), 6, 0, ':') AS [LastRunDuration (HH:MM:SS)] , [sJOBH].[message] AS [最近运行状态信息] , CASE [sJOBSCH].[NextRunDate] WHEN 0 THEN NULL ELSE CAST(CAST([sJOBSCH].[NextRunDate] AS CHAR(8)) + ' ' + STUFF(STUFF(RIGHT('000000' + CAST([sJOBSCH].[NextRunTime] AS VARCHAR(6)), 6), 3, 0, ':'), 6, 0, ':') AS DATETIME) END AS [下次运行时间] FROM [msdb].[dbo].[sysjobs] AS [sJOB] LEFT JOIN ( SELECT [job_id] , MIN([next_run_date]) AS [NextRunDate] , MIN([next_run_time]) AS [NextRunTime] FROM [msdb].[dbo].[sysjobschedules] GROUP BY [job_id] ) AS [sJOBSCH] ON [sJOB].[job_id] = [sJOBSCH].[job_id] LEFT JOIN ( SELECT [job_id] , [run_date] , [run_time] , [run_status] , [run_duration] , [message] , ROW_NUMBER() OVER ( PARTITION BY [job_id] ORDER BY [run_date] DESC, [run_time] DESC ) AS RowNumber FROM [msdb].[dbo].[sysjobhistory] WHERE [step_id] = 0 ) AS [sJOBH] ON [sJOB].[job_id] = [sJOBH].[job_id] AND [sJOBH].[RowNumber] = 1 ORDER BY [作业名] (10)sqlserver紧急状态
EXEC sp_configure 'allow updates', 1 --指定可以直接更新系统表 goreconfigure with override --如果配置不需要重启服务，则配置值直接,改运行值go use mastergoupdate sysdatabases set status = 32768 --该参数为置为紧急状态where name = 'AIS20051209164544'goEXEC sp_configure 'allow updates', 0goreconfigure with override然后重建LDFdbcc rebuild_log( 'AIS20051209164544', 'E:\K3data\mrp\AIS20051209164544_Log.LDF')五、运行以下语句，就可以把数据库的状态还原：update sysdatabases set status=28 where name='AIS20051209164544'EXEC sp_configure 'allow updates',0reconfigure with overrideGo(11)查出走全表扫描最频繁的TOP20表
----- 查出走全表扫描最频繁的TOP20表select top 20 db_name(a.database_id) database_name,object_name(a.object_id) table_name,b.name index_name,a.user_seeks,a.user_scans,a.last_user_seek,a.last_user_scan from sys.dm_db_index_usage_stats ainner join sys.indexes bon a.object_id=b.object_id and a.index_id=b.index_idorder by user_scans desc----查出缺失的索引的表和字段SELECT mig.*, statement AS table_name, column_id, column_name, column_usageFROM sys.dm_db_missing_index_details AS midCROSS APPLY sys.dm_db_missing_index_columns (mid.index_handle)INNER JOIN sys.dm_db_missing_index_groups AS mig ON mig.index_handle = mid.index_handleORDER BY mig.index_group_handle, mig.index_handle, column_id;(12)查看sql启动以来执行耗时top语句
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;(13)查看磁盘情况1
USE masterGOSET NOCOUNT ON--===================public variablesdeclare @db_name sysname ,@drive sysname;select @db_name = NULL --NULL: all databases ,@drive = 'D' --NULL:all drives;--================end public variables--===================private variablesdeclare @sql nvarchar(max) ,@exec_sql nvarchar(max) ,@database_name sysname ,@reservedpages int;select @sql = N'select @reservedpages = sum(a.total_pages)from sys.partitions p WITH(NOLOCK) inner join sys.allocation_units a WITH(NOLOCK) on p.partition_id = a.container_id' ,@database_name = N'' ,@exec_sql = N'' ,@reservedpages = 0;--================end private variables--================for reserved pages savingdeclare @tb_database_reservedpages table( id int identity(1,1) not null PRIMARY key ,database_id int null ,database_name sysname null ,reservedpages int null);DECLARE @tb_dbSize TABLE(id int identity(1,1) not null PRIMARY key,size int null,name sysname null,database_id int null,type bit null ,on_drive char(1) null,f_name sysname null);--size = 8KINSERT INTO @tb_dbSizeSELECT F.size ,DB.name ,F.database_id ,F.type ,left(F.physical_name,1) ,F.name AS f_nameFROM sys.master_files AS F WITH (NOLOCK) INNER JOIN sys.databases AS DB WITH (NOLOCK) ON F.database_id = DB.database_id--==============================================all database reservedpages generationdeclare cur_database cursor local static forward_only read_onlyforselect namefrom sys.databases with(nolock)--==============you can filter the system database or not--where name not in(--'master'--,'tempdb'--,'model'--,'msdb'--,'distribution'--);open cur_databasefetch next from cur_database into @database_namewhile(@@FETCH_STATUS = 0)begin SET @exec_sql = N'USE ' + QUOTENAME(@database_name) + ';' + @sql; exec sys.sp_executesql @exec_sql ,[email protected] int output' ,@reservedpages = @reservedpages output insert into @tb_database_reservedpages select db_id(@database_name),@database_name,@reservedpages; fetch next from cur_database into @database_nameend;close cur_databasedeallocate cur_database--select * from @tb_database_reservedpages--============================================end all database reservedpages generation--====================all database size statistics;WITH dbSize--type = 0AS(SELECT database_name = name, database_id, on_drive, fileSize = sum(size)--*8./1024.FROM @tb_dbSizeWHERE type = 0GROUP BY name,database_id,on_drive),logSize--type = 1AS(SELECT database_name = name, database_id, on_drive, fileSize = sum(size)--*8./1024.FROM @tb_dbSizeWHERE type = 1GROUP BY name,database_id,on_drive),SizeAS( SELECT database_name = name, database_id, dbSize = sum(size)--*8./1024. FROM @tb_dbSize GROUP BY name,database_id)SELECT server_name = @@SERVERNAME ,A.database_name ,[dbSize(MB)] = S.dbSize * 8./1024. ,[dataSize(MB)] = A.fileSize * 8./1024. ,[unallocatedSize(MB)] = ltrim(str((case when [email protected]*/ >= [email protected]*/ then (convert (dec (15,2),[email protected]*/) - convert (dec (15,2),[email protected]*/)) * 8192 / 1048576 else 0 end),15,2) + ' MB') ,data_Drive = A.on_drive ,[logSize(MB)] = B.fileSize * 8./1024. ,log_Drive = B.on_driveFROM dbSize AS A INNER JOIN logSize AS B ON A.database_id = B.database_id INNER JOIN Size AS S ON A.database_id = S.database_id INNER JOIN @tb_database_reservedpages AS rvp ON A.database_id = rvp.database_idWHERE A.database_name = ISNULL(@db_name,A.database_name) AND (A.on_drive = ISNULL(@drive,A.on_drive) OR B.on_drive= ISNULL(@drive,B.on_drive) )ORDER BY S.dbSize DESC --=================end all database size statistics--====================instance summary;WITH DATAAS(select Size = cast(sum(size)*8./1024./1024. AS decimal(9,2)) ,typeFROM @tb_dbSizeGROUP BY type)SELECT server_name = @@SERVERNAME ,[0] + [1] AS [dbSize(GB)] ,[0] AS [dataSize(GB)] ,[1] AS [logSize(GB)] FROM ( SELECT * FROM DATA) AS APIVOT( sum(size) FOR type in([0],[1])) AS B--=================end instance summary(14)查看磁盘情况2
USE masterGOdeclare@drive sysname;select@drive = NULL --null: all the drives;if OBJECT_ID('tempdb.dbo.#Disk','u') is not nulldrop table #DiskCREATE TABLE #Disk( driver char(1) ,freespace nvarchar(255) ,totalspace nvarchar(255) ,freeprecent nvarchar(5) ) DECLARE @TotalDisk TABLE ( t nvarchar(100) ) DECLARE @driver nvarchar(5) ,@totalsize nvarchar(50); INSERT INTO #Disk ( driver ,freespace ) EXEC master.sys.xp_fixeddrives--------============open xp_cmdshellIF EXISTS (SELECT TOP 1 *FROM sys.configurations WITH (NOLOCK)WHERE name='xp_cmdshell' and value=0)BEGINEXEC master.dbo.sp_configure 'show advanced options', 1 RECONFIGURE WITH OVERRIDE EXEC master.dbo.sp_configure 'xp_cmdshell', 1RECONFIGURE WITH OVERRIDE END--------============end open xp_cmdshellDECLARE disk_cur CURSOR LOCAL STATIC FORWARD_ONLY READ_ONLYFOR SELECT driver FROM #DiskOPEN disk_cur FETCH NEXT FROM disk_cur INTO @driver WHILE @@FETCH_STATUS=0 BEGIN INSERT INTO @TotalDisk EXEC('xp_cmdshell ''wmic LogicalDisk WHERE "Caption='''''[email protected]+':''''" GET FreeSpace ,SIZE /VALUE''' ) SELECT @totalsize=t FROM @TotalDisk WHERE t LIKE 'Size%' if(@totalsize is not null and LEN(@totalsize)>4) BEGIN SET @totalsize=REPLACE(SUBSTRING(@totalsize,CHARINDEX('=',@totalsize)+1,LEN(@totalsize)-CHARINDEX('=',@totalsize)-1),' ','') SET @totalsize=cast(cast(RTRIM(@totalsize) as bigint)/1024/1024 as nvarchar(50)) UPDATE #Disk SET [email protected] ,freeprecent=CAST(CAST(freespace AS bigint)*1.0/CAST(@totalsize AS bigint)*100 AS decimal(5,2)) WHERE [email protected] END FETCH NEXT FROM disk_cur INTO @driver END close disk_cur deallocate disk_cur ---==============query summarySELECT GETDATE() datetime ,driver ,[freespace(GB)] = cast(freespace as decimal(10,2))/1024.,[totalspace(GB)] = cast(totalspace as decimal(10,2))/1024.,[freeprecent(%)]= freeprecent FROM #Disk WHERE driver = ISNULL(@drive,driver);if OBJECT_ID('tempdb.dbo.#Disk','u') is not nulldrop table #DiskGO(15)查看所有进程所执行的slq
CREATE TABLE #spids( i INT, spid INT);CREATE TABLE #dbcc( i INT IDENTITY(1,1),EventType NVARCHAR(255), Parameters NVARCHAR(4000), EventInfo NVARCHAR(4000)); DECLARE @spid INT, @sql NVARCHAR(255); SET @sql = N'DBCC INPUTBUFFER(@spid);'; DECLARE c CURSOR LOCAL STATIC FORWARD_ONLY READ_ONLY FOR -- substitute your own query to determine SPIDs to check: SELECT session_id FROM sys.dm_exec_sessions WHERE is_user_process = 1;OPEN c;FETCH NEXT FROM c INTO @spid;WHILE @@FETCH_STATUS = 0BEGIN INSERT #dbcc(EventType, [Parameters], EventInfo) EXEC sp_executesql @sql, N[email protected] INT', @spid; INSERT #spids SELECT SCOPE_IDENTITY(), @spid; FETCH NEXT FROM c INTO @spid;END CLOSE c;DEALLOCATE c; SELECT s.spid, d.EventInfo FROM #spids AS s INNER JOIN #dbcc AS d ON s.i = d.i ORDER BY s.spid; DROP TABLE #spids, #dbcc;(16)查看索引碎片
SELECT schema_name(T.schema_id) AS Schema_Name,T.Name AS Table_Name,I.name AS Index_Name,I.type AS Index_Type,D.avg_fragmentation_in_percent AS avg_fragmentation_in_percent FROM sys.dm_db_index_physical_stats(DB_id('zdlzydb'),null, null, null, null) AS DINNER JOIN sys.indexes AS I WITH(NOLOCK) ON D.index_id=I.index_id AND D.object_id=I.object_idINNER JOIN sys.tables AS T WITH(NOLOCK) ON T.object_id=D.object_idWHERE I.type>0 AND T.is_ms_shipped=0 AND D.avg_fragmentation_in_percent>=30order by D.avg_fragmentation_in_percent desc(17)查找连续7天登录
问如何查询出所有在某一段时间内（如：2012-1-1至2012-1-17)连续7天都有登录的用户。SELECT uid FROM( SELECT count(login_time) as login_count, uid FROM (SELECT date(login_time) login_time, uid FROM tmp_test WHERE login_time>='2012-01-01 00:00:00' AND login_time <'2012-01-18 00:00:00' GROUP BY uid, date(login_time) ORDER BY uid, date(login_time) ) x GROUP BY uid ) x WHERE login_count=7; 版权声明：本文为博主原创文章，未经博主允许不得转载。