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

基于强硬的数据库开发人员对它的强烈反应,CLR集成应该排在前面。=)

其他回答

跟踪旗帜!“1204”在SQL Server 2000上的死锁调试中是无价的(2005有更好的工具)。

在sys.database_principles中设置DEFAULT_SCHEMA

SQL Server在名称解析方面提供了极大的灵活性。然而,名称解析是有代价的,并且在不完全限定对象引用的临时工作负载中可能会显着昂贵。SQL Server 2005允许为每个数据库原则(也称为“user”)设置新的DEFEAULT_SCHEMA,这可以在不更改TSQL代码的情况下消除这种开销。

Link

我最喜欢master..xp_cmdshell。它允许您从服务器上的命令提示符运行命令并查看输出。如果你不能登录到服务器,但你需要获取信息或以某种方式控制它,它是非常有用的。

例如,列出运行SQL server的服务器C:驱动器上的文件夹。

主. .Xp_cmdshell ` dir c:\ `

您还可以启动和停止服务。

主. .xp_cmdshell的sc查询“My . 服务”的 主. .xp_cmdshell 'sc stop“My . 服务”的 主. .xp_cmdshell 'sc start“My . 服务”的

它很强大,但也有安全隐患。许多人禁用它,因为它很容易被用来在服务器上做坏事。但是,如果你能接触到它,它会非常有用。

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。

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