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

你是否曾经不小心点击了执行按钮，而你实际上想点击: 调试/解析/使用数据库/查询选项卡之间的切换/等?

下面是把按钮移到安全的地方的方法:

工具—>自定义。然后拖动按钮到你想要的地方

你还可以: -添加/删除其他常用/不常用的按钮(甚至适用于菜单栏中的命令，如文件/编辑) -改变按钮的图标图像(见下面的小猪改变按钮图像..lol)

2011-05-26 00:48:49

其他回答

sp_executesql

用于执行字符串中的语句。与Execute一样好，但可以返回参数

2008-10-24 16:21:10

HashBytes()返回其输入的MD2、MD4、MD5、SHA或SHA1哈希值。

2008-09-23 14:21:35

用于解析存储过程参数:xp_sscanf

将数据从字符串读入每个格式参数指定的参数位置。下面的示例使用xp_sscanf 从源中提取两个值属性中的位置源字符串的格式。

DECLARE @filename varchar (20), @message varchar (20)
EXEC xp_sscanf 'sync -b -fproducts10.tmp -rrandom', 'sync -b -f%s -r%s', 
  @filename OUTPUT, @message OUTPUT
SELECT @filename, @message

这是结果集。

-------------------- -------------------- 
products10.tmp        random

2008-09-23 14:47:43

因为我是程序员，而不是DBA，所以我最喜欢的隐藏特性是SMO库。从数据库/表/列的创建和删除，到脚本编写，再到备份和恢复，在SQL Server中几乎任何事情都可以自动化。如果你能在SQL Server Management Studio中完成它，你也可以在SMO中自动化它。

2008-10-24 16:36:34

Vardecimal存储格式

SQL Server 2005为数字和十进制数据类型添加了一种新的存储格式，称为vardecimal。Vardecimal是十进制类型的一种变长表示，可以在行的每个实例中保存未使用的字节。如果十进制定义很大(如decimal(38,6))，但存储的值很小(如0.0)，或者有大量重复值，或者数据填充稀疏，则可以节省最多的时间。

Link

2008-09-29 17:02:46

SQL Server的隐藏特性

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