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EncryptByKey进行简单加密

2008-09-23 14:34:16

其他回答

强制参数化

参数化允许SQL Server利用查询计划重用，并避免后续执行类似查询时的编译和优化开销。然而，由于这样或那样的原因，仍然有许多应用程序存在特殊的查询编译开销。对于查询编译次数较多、降低CPU利用率和响应时间对工作负载至关重要的情况，强制参数化可以提供帮助。

Link

2008-09-29 17:02:20

BCP_IN和BCP_OUT完美的批量数据导入和导出

2010-10-07 11:01:43

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

通过关键字查找过程

哪些过程包含特定的文本(表名、列名、变量名、TODO等)?

SELECT OBJECT_NAME(ID) FROM SysComments 
WHERE Text LIKE '%SearchString%' 
AND OBJECTPROPERTY(id, 'IsProcedure') = 1

2008-10-01 21:26:32

执行一个存储过程，并在(temp)表中捕获结果，以便进一步处理，例如:

INSERT INTO someTable EXEC sp_someproc

示例:显示sp_help输出，但按数据库大小排序:

CREATE TABLE #dbs
(
    name nvarchar(50),
    db_size nvarchar(50),
    owner nvarchar(50),
    dbid int,
    created datetime,
    status nvarchar(255),
    compatiblity_level int
)
INSERT INTO #dbs EXEC sp_helpdb

SELECT * FROM #dbs 
ORDER BY CONVERT(decimal, LTRIM(LEFT(db_size, LEN(db_size)-3))) DESC

DROP TABLE #dbs

2009-05-29 14:18:09

SQL Server的隐藏特性

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