SQL2

查看当前用户查看当前用户
select system_user

检查SQL Agent是否开启

IF EXISTS (

SELECT TOP 1 1

FROM sys.sysprocesses

WHERE program_name = 'SQLAgent - Generic Refresher'

)

SELECT 'Running'

ELSE

SELECT 'Not Running'

查看是否做了镜像

select

    a.database_id

    ,a.name 数据库名称

    ,case when b.mirroring_guid is null then '否' else '是' end 是否镜像

    ,b.mirroring_partner_name 镜像服务器名称

from 

[sys].[databases] a

left join [sys].[database_mirroring] b on a.database_id=b.database_id

分离数据库

USE master;

EXEC sp_detach_db @dbname = 'test';#test指需要分离的数据库

附加数据库
SELECT type_desc, name, physical_name from sys.database_files;#查看物理数据库文件的位置

#使用带 FOR ATTACH 子句的 CREATE DATABASE 语句附加之前分离的test数据库

CREATE DATABASE test   

    ON (FILENAME = 'C:\Program Files\Microsoft SQL Server\MSSQL13.MSSQLSERVER\MSSQL\DATA\test.mdf'),   

    (FILENAME = 'C:\Program Files\Microsoft SQL Server\MSSQL13.MSSQLSERVER\MSSQL\DATA\test_log.ldf')   

    FOR ATTACH;

查看主从复制关系

SELECT * FROM msdb.dbo.sysjobs；

SELECT 

    serverproperty('servername') AS ServerName,

    CASE 

        WHEN serverproperty('servername') = '主服务器名称' THEN '主服务器'

        ELSE '从服务器'

    END AS ServerRole

#也可以通过以下语句来查询

SELECT * FROM sys.objects WHERE name = 'MSreplication_options'

查看实例级别的信息
select SERVERPROPERTY ('test')

查看实例级别的某个参数allow updates的配置
select * from sys.configurations where name='allow updates'

查询当前数据库的所有架构范围的对象
select * from sys.all_objects

查询当前数据库的所有对象
select * from sys.sysobjects

在当前数据库下可以查询到所有数据库信息，包含是否on状态
select * from sys.databases

查询所有数据库信息
select * from sys.sysdatabases

查询当前数据库下所有正在SQL Server 实例上运行的进程的相关信息
select * from sys.sysprocesses

监控日志空间
DBCC SQLPERF (LOGSPACE)

查看数据库各种设置
select name,State,user_access,is_read_only,recovery_model from sys.databases
查询当前数据库是否有会话
select DB_NAME(dbid),* from sys.sysprocesses where dbid=db_id('test')
查询当前阻塞的所有请求

SELECT session_Id,spid,ecid,DB_NAME (sp.dbid),nt_username,er.status,wait_type,

[Individual Query] =SUBSTRING (qt.text,er.statement_start_offset / 2,

( CASE

WHEN er.statement_end_offset = -1

THEN

LEN (CONVERT (NVARCHAR (MAX), qt.text)) * 2

ELSE

er.statement_end_offset

END

- er.statement_start_offset)

/ 2),

qt.text,program_name,Hostname,nt_domain,start_time

FROM sys.dm_exec_requests er

INNER JOIN sys.sysprocesses sp ON er.session_id = sp.spid

CROSS APPLY sys.dm_exec_sql_text (er.sql_handle) AS qt

WHERE session_Id > 50 /* Ignore system spids.*/

AND sp.blocked>0 AND session_Id NOT IN (@@SPID)

查看活动线程执行的sql语句,并生成批量杀掉的语句

select 'KILL '+CAST(a.spid AS NVARCHAR(100)) AS KillCmd,REPLACE(hostname,' ','') as hostname ,replace(program_name,' ','') as program_name

,REPLACE(loginame, ' ', '') AS loginame, db_name(a.dbid) AS DBname,spid,blocked,waittime/1000 as waittime

,a.status,Replace(b.text,'''','''') as sqlmessage,cpu

from sys.sysprocesses as a with(nolock)

cross apply sys.dm_exec_sql_text(sql_handle) as b

where a.status<>'sleeping' AND a.spid<>@@SPID

查看数据库的最近备份信息

SELECT database_name,type,MAX(backup_finish_date) AS backup_finish_date FROM msdb.dbo.backupset GROUP BY database_name,type ORDER BY database_name,type

备注：D 表示全备份，i 表示差异备份，L 表示日志备份

查看备份进度

SELECT DB_NAME(database_id) AS Exec_DB

,percent_complete

,CASE WHEN estimated_completion_time < 36000000

THEN '0' ELSE '' END + RTRIM(estimated_completion_time/1000/3600)

+ ':' + RIGHT('0' + RTRIM((estimated_completion_time/1000)%3600/60), 2)

+ ':' + RIGHT('0' + RTRIM((estimated_completion_time/1000)%60), 2) AS [Time Remaining]

,b.text as tsql

,*

FROM SYS.DM_EXEC_REQUESTS

cross apply sys.dm_exec_sql_text(sql_handle) as b

WHERE command LIKE 'Backup%' --and database_id=db_id('cardorder')

--OR command LIKE 'RESTORE%'

ORDER BY 2 DESC

查询always on状态是否正常

select dc.database_name, d.synchronization_health_desc, d.synchronization_state_desc, d.database_state_desc from sys.dm_hadr_database_replica_states d join sys.availability_databases_cluster dc on d.group_database_id=dc.group_database_id and d.is_local=1

查看mirror镜像信息

SELECT

db_name(database_id),

mirroring_state_desc,

mirroring_role_desc,

mirroring_partner_name,

mirroring_partner_instance

FROM sys.database_mirroring

查看每个数据库实例的数据量大小

SELECT

DB_NAME(db.database_id) DatabaseName,

(CAST(mfrows.RowSize AS FLOAT)*8)/1024 RowSizeMB,

(CAST(mflog.LogSize AS FLOAT)*8)/1024 LogSizeMB,

(CAST(mfstream.StreamSize AS FLOAT)*8)/1024 StreamSizeMB,

(CAST(mftext.TextIndexSize AS FLOAT)*8)/1024 TextIndexSizeMB

FROM sys.databases db

LEFT JOIN (SELECT database_id, SUM(size) RowSize FROM sys.master_files WHERE type = 0 GROUP BY database_id, type) mfrows ON mfrows.database_id = db.database_id

LEFT JOIN (SELECT database_id, SUM(size) LogSize FROM sys.master_files WHERE type = 1 GROUP BY database_id, type) mflog ON mflog.database_id = db.database_id

LEFT JOIN (SELECT database_id, SUM(size) StreamSize FROM sys.master_files WHERE type = 2 GROUP BY database_id, type) mfstream ON mfstream.database_id = db.database_id

LEFT JOIN (SELECT database_id, SUM(size) TextIndexSize FROM sys.master_files WHERE type = 4 GROUP BY database_id, type) mftext ON mftext.database_id = db.database_id

查询总耗CPU最多的前3个SQL，且最近5天出现过

SELECT TOP 3

total_worker_time/1000 AS [总消耗CPU 时间(ms)],execution_count [运行次数],

qs.total_worker_time/qs.execution_count/1000 AS [平均消耗CPU 时间(ms)],

last_execution_time AS [最后一次执行时间],max_worker_time /1000 AS [最大执行时间(ms)],

SUBSTRING(qt.text,qs.statement_start_offset/2+1,

(CASE WHEN qs.statement_end_offset = -1

THEN DATALENGTH(qt.text)

ELSE qs.statement_end_offset END -qs.statement_start_offset)/2 + 1)

AS [使用CPU的语法], qt.text [完整语法],

qt.dbid, dbname=db_name(qt.dbid),

qt.objectid,object_name(qt.objectid,qt.dbid) ObjectName

FROM sys.dm_exec_query_stats qs WITH(nolock)

CROSS apply sys.dm_exec_sql_text(qs.sql_handle) AS qt

WHERE execution_count>1 and last_execution_time>dateadd(dd,-5,getdate())

ORDER BY total_worker_time DESC

查看当前最耗资源的10个SQL及其spid

SELECT TOP 10

session_id,request_id,start_time AS '开始时间',status AS '状态',

command AS '命令',d_sql.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 d_request

CROSS APPLY

sys.dm_exec_sql_text(d_request.sql_handle) AS d_sql

WHERE session_id>50

ORDER BY cpu_time DESC

--前50号session_id一般是系统后台进程，sys.dm_exec_requests的status显示为background

always on

查看集群各节点的信息，包含节点成员的名称，类型，状态，拥有的投票仲裁数
SELECT * FROM sys.dm_hadr_cluster_members;

查看集群各节点的信息，包含节点成员的名称，节点成员上的sql实例名称
select * from sys.dm_hadr_instance_node_map

查看WSFC(windows server故障转移群集)的信息，包含集群名称，仲裁类型，仲裁状态
SELECT * FROM SYS.dm_hadr_cluster;

查看AG名称
select * from sys.dm_hadr_name_id_map

查看集群各节点的子网信息，包含节点成员的名称，子网段，子网掩码

SELECT * FROM sys.dm_hadr_cluster_networks;

查看侦听ip
select * from sys.availability_group_listeners;

查看主从各节点的状态
复制

select d.is_local,dc.database_name, d.synchronization_health_desc, 

d.synchronization_state_desc, d.database_state_desc 

from sys.dm_hadr_database_replica_states d 

join sys.availability_databases_cluster dc 

on d.group_database_id=dc.group_database_id;

查看辅助副本(传说中的从库)延迟多少M日志量

select db_name(database_id),log_send_queue_size/1024 delay_M,* 

from sys.dm_hadr_database_replica_states where is_primary_replica=0;

查看DDL操作的记录
select * from Sys.traces