SQL Server的隐藏特性

SQL Server有哪些隐藏特性?

例如，没有文档的系统存储过程，做一些非常有用但没有足够文档的事情的技巧?

答案

感谢大家的精彩回答!

存储过程

sp_msforeachtable: Runs a command with '?' replaced with each table name (v6.5 and up) sp_msforeachdb: Runs a command with '?' replaced with each database name (v7 and up) sp_who2: just like sp_who, but with a lot more info for troubleshooting blocks (v7 and up) sp_helptext: If you want the code of a stored procedure, view & UDF sp_tables: return a list of all tables and views of database in scope. sp_stored_procedures: return a list of all stored procedures xp_sscanf: Reads data from the string into the argument locations specified by each format argument. xp_fixeddrives:: Find the fixed drive with largest free space sp_help: If you want to know the table structure, indexes and constraints of a table. Also views and UDFs. Shortcut is Alt+F1

片段

Returning rows in random order All database User Objects by Last Modified Date Return Date Only Find records which date falls somewhere inside the current week. Find records which date occurred last week. Returns the date for the beginning of the current week. Returns the date for the beginning of last week. See the text of a procedure that has been deployed to a server Drop all connections to the database Table Checksum Row Checksum Drop all the procedures in a database Re-map the login Ids correctly after restore Call Stored Procedures from an INSERT statement Find Procedures By Keyword Drop all the procedures in a database Query the transaction log for a database programmatically.

功能

哈希字节（） EncryptByKey 枢轴命令

Misc

Connection String extras TableDiff.exe Triggers for Logon Events (New in Service Pack 2) Boosting performance with persisted-computed-columns (pcc). DEFAULT_SCHEMA setting in sys.database_principles Forced Parameterization Vardecimal Storage Format Figuring out the most popular queries in seconds Scalable Shared Databases Table/Stored Procedure Filter feature in SQL Management Studio Trace flags Number after a GO repeats the batch Security using schemas Encryption using built in encryption functions, views and base tables with triggers

当前回答

SQLCMD

如果您有脚本需要反复运行，但必须更改轻微的细节，那么在sqlcmd模式下运行ssms非常棒。sqlcmd命令行也非常漂亮。

我最喜欢的特点是:

你需要设置变量。适当的变量，不需要跳过sp_exec圈您可以一个接一个地运行多个脚本这些脚本可以引用“外部”脚本中的变量

Red Gate的Simpletalk没有再滔滔滔滔地说什么，而是对sqlcmd - sqlcmd工作台做了一个很棒的总结。Donabel Santos也有一些很棒的SQLCMD示例。

2009-06-23 09:53:23

其他回答

我发现这个小脚本非常方便地查看已经部署到服务器上的过程的文本:

DECLARE @procedureName NVARCHAR( MAX ), @procedureText NVARCHAR( MAX )

SET @procedureName = 'myproc_Proc1'

SET @procedureText =    (
                            SELECT  OBJECT_DEFINITION( object_id )
                            FROM    sys.procedures 
                            WHERE   Name = @procedureName
                        )

PRINT @procedureText

2008-09-23 16:43:33

在SQL Server 2005中，您不再需要运行sp-blocker-pss80存储过程。相反，你可以这样做:

exec sp_configure 'show advanced options', 1;
reconfigure;
go
exec sp_configure 'blocked process threshold', 30;
reconfigure;

然后，您可以启动SQL跟踪，并在“错误和警告”组中选择“阻塞”流程报告事件类。详情请点击这里。

2008-11-25 19:57:47

查找日期落在当前周内的记录。

where dateadd( week, datediff( week, 0, TransDate ), 0 ) =
dateadd( week, datediff( week, 0, getdate() ), 0 )

查找上周发生的日期记录。

where dateadd( week, datediff( week, 0, TransDate ), 0 ) =
dateadd( week, datediff( week, 0, getdate() ) - 1, 0 )

返回当前周的开始日期。

select dateadd( week, datediff( week, 0, getdate() ), 0 )

返回上周开始的日期。

select dateadd( week, datediff( week, 0, getdate() ) - 1, 0 )

2008-09-23 15:55:41

有时没有合适的列来排序，或者您只是想要表上的默认排序顺序，并且希望枚举每一行。为了做到这一点，你可以把“(select 1)”放在“order by”子句中，你就会得到你想要的东西。整洁的,是吗?

select row_number() over (order by (select 1)), * from dbo.Table as t

2010-09-05 15:37:31

删除到数据库的所有连接:

Use Master
Go

Declare @dbname sysname

Set @dbname = 'name of database you want to drop connections from'

Declare @spid int
Select @spid = min(spid) from master.dbo.sysprocesses
where dbid = db_id(@dbname)
While @spid Is Not Null
Begin
        Execute ('Kill ' + @spid)
        Select @spid = min(spid) from master.dbo.sysprocesses
        where dbid = db_id(@dbname) and spid > @spid
End

2008-09-23 15:56:16

SQL Server的隐藏特性

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