SQL Server常用查询

Posted 2023-05-03 沐风

序言

 

结果集拼接

左右横向拼接

LEFT JOIN

上线纵向拼接

UNION

union: 得到两个查询结果的并集，并且自动去掉重复行。不会排序

union all: 得到两个查询结果的并集，不会去掉重复行。也不会排序

 

YEAR

MONTH

资料

SQL Server 诊断查询-

Query #1 is Version Info.?

? SQL and OS Version information for current instance

SELECT @@SERVERNAME AS [Server Name], @@VERSIONAS [SQL Server and OS Version Info];

?

Query #2 is Core Counts.?

? Get socket, physical core and logical core count from the SQL Server Error log.

EXEC sys.xp_readerrorlog 0, 1, N‘detected‘, N‘socket‘;

?

Query #3 is Server Properties.

? ?Get selected server properties.

SELECT ?SERVERPROPERTY(‘MachineName‘)?AS?[MachineName],?

SERVERPROPERTY(‘ServerName‘)?AS?[ServerName],??

SERVERPROPERTY(‘InstanceName‘)?AS?[Instance],?

SERVERPROPERTY(‘IsClustered‘)?AS?[IsClustered],?

SERVERPROPERTY(‘ComputerNamePhysicalNetBIOS‘)?AS?[ComputerNamePhysicalNetBIOS],?

SERVERPROPERTY(‘Edition‘)?AS?[Edition],?

SERVERPROPERTY(‘ProductLevel‘)?AS?[ProductLevel],????????????????--?What?servicing?branch?(RTM/SP/CU)

SERVERPROPERTY(‘ProductUpdateLevel‘)?AS?[ProductUpdateLevel],????--?Within?a?servicing?branch,?what?CU#?is?applied

SERVERPROPERTY(‘ProductVersion‘)?AS?[ProductVersion],

SERVERPROPERTY(‘ProductMajorVersion‘)?AS?[ProductMajorVersion],?

SERVERPROPERTY(‘ProductMinorVersion‘)?AS?[ProductMinorVersion],?

SERVERPROPERTY(‘ProductBuild‘)?AS?[ProductBuild],?

SERVERPROPERTY(‘ProductBuildType‘)?AS?[ProductBuildType],??????????????--?Is?this?a?GDR?or?OD?hotfix?(NULL?if?on?a?CU?build)

SERVERPROPERTY(‘ProductUpdateReference‘)?AS?[ProductUpdateReference],?--?KB?article?number?that?is?applicable?for?this?build

SERVERPROPERTY(‘ProcessID‘)?AS?[ProcessID],

SERVERPROPERTY(‘Collation‘)?AS?[Collation],?

SERVERPROPERTY(‘IsFullTextInstalled‘)?AS?[IsFullTextInstalled],?

SERVERPROPERTY(‘IsIntegratedSecurityOnly‘)?AS?[IsIntegratedSecurityOnly],

SERVERPROPERTY(‘FilestreamConfiguredLevel‘)?AS?[FilestreamConfiguredLevel],

SERVERPROPERTY(‘IsHadrEnabled‘)?AS?[IsHadrEnabled],?

SERVERPROPERTY(‘HadrManagerStatus‘)?AS?[HadrManagerStatus],

SERVERPROPERTY(‘IsXTPSupported‘)?AS?[IsXTPSupported],

SERVERPROPERTY(‘IsPolybaseInstalled‘)?AS?[IsPolybaseInstalled],????--?New?for?SQL?Server?2016

SERVERPROPERTY(‘InstanceDefaultDataPath‘)?AS?[InstanceDefaultDataPath],

SERVERPROPERTY(‘InstanceDefaultLogPath‘)?AS?[InstanceDefaultLogPath],

SERVERPROPERTY(‘BuildClrVersion‘)?AS?[Build?CLR?Version];

--?This?gives?you?a?lot?of?useful?information?about?your?instance?of?SQL?Server,

--?such?as?the?ProcessID?for?SQL?Server?and?your?collation

--?Some?columns?will?be?NULL?on?older?SQL?Server?builds

?

Query #4 is Configuration Values.?

-- Get instance-level configuration values for instance

SELECT name, value, value_in_use, minimum, maximum, [description], is_dynamic, is_advanced

FROM sys.configurations WITH (NOLOCK)

ORDERBY name OPTION (RECOMPILE);

-- Focus on these settings:

-- automatic soft-NUMA disabled (should be 0 in most cases)

-- backup checksum default (should be 1)

-- backup compression default (should be 1 in most cases)

-- clr enabled (only enable if it is needed)

-- cost threshold for parallelism (depends on your workload)

-- lightweight pooling (should be zero)

-- max degree of parallelism (depends on your workload and hardware)

-- max server memory (MB) (set to an appropriate value, not the default)

-- optimize for ad hoc workloads (should be 1)

-- priority boost (should be zero)

-- remote admin connections (should be 1)

-- New options for SQL Server 2016

-- hadoop connectivity

-- polybase network encryption

-- remote data archive (to enable Stretch Databases)

?

Query #5 Global Trace Flags

-- Returns a list of all global trace flags that are enabled (Query 5) (Global Trace Flags)

DBCC TRACESTATUS (-1);

-- If no global trace flags are enabled, no results will be returned.

-- It is very useful to know what global trace flags are currently enabled as part of the diagnostic process.

-- Common trace flags that should be enabled in most cases

-- TF 3226 - Supresses logging of successful database backup messages to the SQL Server Error Log

-- The behavior of TF 1118 and 2371 are enabled in SQL Server 2016 by default

?

Query #6 Process Memory

-- SQL Server Process Address space info (Query 6) (Process Memory)

-- (shows whether locked pages is enabled, among other things)

SELECT physical_memory_in_use_kb/1024 AS [SQL Server Memory Usage (MB)],

large_page_allocations_kb, locked_page_allocations_kb, page_fault_count,

memory_utilization_percentage, available_commit_limit_kb,

process_physical_memory_low, process_virtual_memory_low

FROM sys.dm_os_process_memory WITH (NOLOCK) OPTION (RECOMPILE);?

-- You want to see 0 for process_physical_memory_low

-- You want to see 0 for process_virtual_memory_low

-- This indicates that you arenotunder internal memory pressure

?

Query #7 SQL Server Services Info

-- SQL Server Services information (Query 7) (SQL Server Services Info)

SELECT servicename, process_id, startup_type_desc, status_desc,

last_startup_time, service_account, is_clustered, cluster_nodename, [filename]

FROM sys.dm_server_services WITH (NOLOCK) OPTION (RECOMPILE);

-- Tells you the account being used for the SQL Server Service and the SQL Agent Service

-- Shows the process_id, when they were last started, and their current status

-- Shows whether you are running on a failover cluster instance

?

Query #8 SQL Server Agent Jobs

--?Get?SQL?Server?Agent?jobs?and?Category?information?(Query?8)?(SQL?Server?Agent?Jobs)

?SELECT?sj.name?AS?[JobName],?sj.[description]?AS?[JobDescription],?SUSER_SNAME(sj.owner_sid)?AS?[JobOwner],

?sj.date_created,?sj.[enabled],?sj.notify_email_operator_id,?sj.notify_level_email,?sc.name?AS?[CategoryName],

?js.next_run_date,?js.next_run_time

?FROM?msdb.dbo.sysjobs?AS?sj?WITH?(NOLOCK)

?INNER?JOIN?msdb.dbo.syscategories?AS?sc?WITH?(NOLOCK)

?ON?sj.category_id?=?sc.category_id

?LEFT?OUTER?JOIN?msdb.dbo.sysjobschedules?AS?js?WITH?(NOLOCK)

?ON?sj.job_id?=?js.job_id

?ORDER?BY?sj.name?OPTION?(RECOMPILE);

?--?Gives?you?some?basic?information?about?your?SQL?Server?Agent?jobs,?who?owns?them?and?how?they?are?configured

?--?Look?for?Agent?jobs?that?are?not?owned?by?sa

?--?Look?for?jobs?that?have?a?notify_email_operator_id?set?to?0?(meaning?no?operator)

?--?Look?for?jobs?that?have?a?notify_level_email?set?to?0?(meaning?no?e-mail?is?ever?sent)

?--?MSDN?sysjobs?documentation

?--?//msdn.microsoft.com/en-us/library/ms189817.aspx

?

Query #9 SQL Server Agent Alerts

-- Get SQL Server Agent Alert Information (Query 9) (SQL Server Agent Alerts)

SELECT name, event_source, message_id, severity, [enabled], has_notification,

delay_between_responses, occurrence_count, last_occurrence_date, last_occurrence_time

FROM msdb.dbo.sysalerts WITH (NOLOCK)

ORDERBY name OPTION (RECOMPILE);

-- Gives you some basic information about your SQL Server Agent Alerts (which are different from SQL Server Agent jobs)

-- Read more about Agent Alerts here: http://www.sqlskills.com/blogs/glenn/creating-sql-server-agent-alerts-for-critical-errors/

?

?

Query #10 Windows Info

--?Windows?information?(Query?10)?(Windows?Info)

???SELECT?windows_release,?windows_service_pack_level,?

??????????windows_sku,?os_language_version

???FROM?sys.dm_os_windows_info?WITH?(NOLOCK)?OPTION?(RECOMPILE);

--?Gives?you?major?OS?version,?Service?Pack,?Edition,?and?language?info?for?the?operating?system

???--?10.0?is?either?Windows?10?or?Windows?Server?2016

???--?6.3?is?either?Windows?8.1?or?Windows?Server?2012?R2?

???--?6.2?is?either?Windows?8?or?Windows?Server?2012

???--?6.1?is?either?Windows?7?or?Windows?Server?2008?R2

???--?6.0?is?either?Windows?Vista?or?Windows?Server?2008

???--?Windows?SKU?codes

???--?4?is?Enterprise?Edition

???--?7?is?Standard?Server?Edition

???--?8?is?Datacenter?Server?Edition

???--?10?is?Enterprise?Server?Edition

???--?48?is?Professional?Edition

???--?1033?for?os_language_version?is?US-English

???--?SQL?Server?2014?requires?Windows?Server?2012?or?newer

???--?Quick-Start?Installation?of?SQL?Server?2016

???--?https://msdn.microsoft.com/en-us/library/bb500433(v=sql.130).aspx

???--?Hardware?and?Software?Requirements?for?Installing?SQL?Server?2016

???--?https://msdn.microsoft.com/en-us/library/ms143506(v=sql.130).aspx

???--?Using?SQL?Server?in?Windows?8,?Windows?8.1,?Windows?Server?2012?and?Windows?Server?2012?R2?environments

???--?http://support.microsoft.com/kb/2681562

?

Query #11 SQL Server NUMA Info

-- SQL Server NUMA Node information

SELECT node_id, node_state_desc, memory_node_id, processor_group, online_scheduler_count,

active_worker_count, avg_load_balance, resource_monitor_state

FROM sys.dm_os_nodes WITH (NOLOCK)

WHERE node_state_desc <> N‘ONLINE DAC‘OPTION (RECOMPILE);

--

avg_load_balance :Average number of tasks per scheduler on this node.

-- Gives you some useful information about the composition and relative load on your NUMA nodes

-- You want to see an equal number of schedulers on each NUMA node

-- Watch out if SQL Server 2016 Standard Edition has been installed on a machine with more than 16 physical cores

? ?

-- Balancing Your Available SQL Server Core Licenses Evenly Across NUMA Nodes

-- http://www.sqlskills.com/blogs/glenn/balancing-your-available-sql-server-core-licenses-evenly-across-numa-nodes/

?

Query #12 System Memory

-- Good basic information about OS memory amounts and state

SELECT total_physical_memory_kb/1024 AS [Physical Memory (MB)],

available_physical_memory_kb/1024 AS [Available Memory (MB)],

total_page_file_kb/1024 AS [Total Page File (MB)],

available_page_file_kb/1024 AS [Available Page File (MB)],

system_cache_kb/1024 AS [System Cache (MB)],

system_memory_state_desc AS [System Memory State]

FROM sys.dm_os_sys_memory WITH (NOLOCK) OPTION (RECOMPILE);

-- You want to see "Available physical memory is high" for System Memory State

-- This indicates that you are not under external memory pressure