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

使用osql实用程序运行命令行查询/脚本/批处理

2009-09-01 19:00:27

其他回答

以下是一些我认为有用但很多人似乎不知道的功能:

sp_tables

返回可以为的对象列表在当前环境下查询。这意味着任何对象都可以出现在FROM子句中，同义词除外对象。

Link

sp_stored_procedures

中存储过程的列表当前环境。

Link

2008-09-23 14:18:59

根据单个语句中管道分隔的id字符串返回结果(替代传递xml或首先将分隔的字符串转换为表)

例子:

DECLARE @nvcIDs nvarchar(max)
SET @nvcIDs = '|1|2|3|'

SELECT C.*
FROM tblCompany C
WHERE @nvcIDs LIKE '%|' + CAST(C.CompanyID as nvarchar) + '|%'

2009-05-21 18:17:19

如果您想删除数据库中的所有过程-

SELECT  IDENTITY ( int, 1, 1 ) id, 
        [name] 
INTO    #tmp 
FROM    sys.procedures 
WHERE   [type]        = 'P' 
    AND is_ms_shipped = 0 

DECLARE @i INT 

SELECT   @i = COUNT( id ) FROM #tmp 
WHILE    @i > 0 
BEGIN 
   DECLARE @name VARCHAR( 100 ) 
   SELECT @name = name FROM #tmp WHERE id = @i 
   EXEC ( 'DROP PROCEDURE ' + @name ) 
   SET @i = @i-1 
END

DROP TABLE #tmp

2008-09-23 16:46:28

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

在SQL Server 2005/2008中显示SELECT查询结果中的行号:

SELECT ( ROW_NUMBER() OVER (ORDER BY OrderId) ) AS RowNumber,
        GrandTotal, CustomerId, PurchaseDate
FROM Orders

ORDER BY是一个强制性条款。OVER()子句告诉SQL引擎对指定列(在本例中为OrderId)上的数据进行排序，并根据排序结果分配数字。

2009-02-10 15:22:30

SQL Server的隐藏特性

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