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

以下是我最喜欢的一些东西:

在sp2 -工具/选项/脚本下增加了脚本选项

使用模式的新安全性—创建两个模式:user_access、admin_access。把你的用户过程放在一个，你的管理过程放在另一个，像这样:user_access。showList, admin_access.deleteUser。将模式上的EXECUTE授权给你的应用用户/角色。不再一直授予EXECUTE。

使用内置加密函数、视图(为了表示而解密)和带触发器的基表(在插入/更新时加密)进行加密。

2008-10-20 18:49:30

其他回答

Sql 2000 + DBCC DROPCLEANBUFFERS:清除缓冲区。当缓冲区是干净的时，用于测试查询的速度。

2009-12-18 14:23:58

表校验和

Select CheckSum_Agg(Binary_CheckSum(*)) From Table With (NOLOCK)

行校验和

Select CheckSum_Agg(Binary_CheckSum(*)) From Table With (NOLOCK) Where Column = Value

2008-09-23 15:56:53

一个不太为人所知的TSQL技术，以随机顺序返回行:

-- Return rows in a random order
SELECT 
    SomeColumn 
FROM 
    SomeTable
ORDER BY 
    CHECKSUM(NEWID())

2008-09-23 15:13:40

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

2008-09-23 14:21:35

使用EncryptByKey进行简单加密

2008-09-23 14:34:16

SQL Server的隐藏特性

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