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

use db
go      
DECLARE @procName varchar(100)      
DECLARE @cursorProcNames CURSOR      
SET @cursorProcNames = CURSOR FOR      
select name from sys.procedures where modify_date > '2009-02-05 13:12:15.273' order by modify_date desc     

OPEN @cursorProcNames      
FETCH NEXT      
FROM @cursorProcNames INTO @procName      
WHILE @@FETCH_STATUS = 0      
BEGIN      
-- see the text of the last stored procedures modified on 
-- the db , hint Ctrl + T would give you the procedures test 
set nocount off;      
exec sp_HelpText @procName --- or print them      
-- print @procName      

FETCH NEXT      
FROM @cursorProcNames INTO @procName      
END      
CLOSE @cursorProcNames      

select @@error

2009-02-12 19:42:08

其他回答

可伸缩的共享数据库

通过可伸缩共享数据库，可以在普通机器上挂载相同的物理驱动器，并允许多个SQL Server 2005实例使用同一组数据文件。这种设置不需要为每个SQL Server实例复制存储，并且允许多个SQL Server实例具有额外的处理能力，这些实例具有自己的本地资源，如cpu、内存、tempdb和其他潜在的本地数据库。

Link

2008-09-29 17:03:32

这不是一个隐藏的功能，而是在管理工作室的工具\选项\键盘下设置键映射: Alt+F1默认为sp_help“选定的文本”，但我不能没有添加Ctrl+F1为sp_helptext“选定的文本”

2008-09-23 23:17:05

登录事件的触发器

Logon triggers can help complement auditing and compliance. For example, logon events can be used for enforcing rules on connections (for example limiting connection through a specific username or limiting connections through a username to a specific time periods) or simply for tracking and recording general connection activity. Just like in any trigger, ROLLBACK cancels the operation that is in execution. In the case of logon event that means canceling the connection establishment. Logon events do not fire when the server is started in the minimal configuration mode or when a connection is established through dedicated admin connection (DAC).

Link

2008-09-29 17:00:24

使用EncryptByKey进行简单加密

2008-09-23 14:34:16

我知道它并不是完全隐藏的，但是没有太多人知道PIVOT命令。我能够改变一个使用游标的存储过程，并花费2分钟来运行一段6秒的代码，而这段代码的行数是原来的十分之一!

2008-10-08 23:36:51

SQL Server的隐藏特性

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