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

在Management Studio中，您可以通过以下方法快速获得一个以逗号分隔的表列列表:

在对象资源管理器中，展开给定表下的节点(这样你会看到列、键、约束、触发器等文件夹)。指向Columns文件夹并拖动到查询中。

当你不想使用令人发指的返回格式时，右键单击表格并选择Script table As…插入到…这个技巧也适用于其他文件夹，因为它将为您提供文件夹中包含的逗号分隔的名称列表。

2010-07-20 15:22:36

其他回答

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

连接字符串额外功能:

MultipleActiveResultSets = true;

这就产生了ADO。Net 2.0及以上版本在单个数据库连接上读取多个只向前、只读的结果集，如果要进行大量读取，这可以提高性能。即使是混合执行查询类型，也可以打开它。

应用程序名称= MyProgramName

现在，当您希望通过查询sysprocesses表来查看活动连接列表时，程序的名称将出现在program_name列中，而不是“”。Net SqlClient数据提供程序

2008-09-23 15:21:30

使用EncryptByKey进行简单加密

2008-09-23 14:34:16

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

仅限返回日期

Select Cast(Floor(Cast(Getdate() As Float))As Datetime)

Select DateAdd(Day, 0, DateDiff(Day, 0, Getdate()))

2008-09-23 15:54:23

SQL Server的隐藏特性

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