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

BCP_IN和BCP_OUT完美的批量数据导入和导出

2010-10-07 11:01:43

其他回答

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

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

Persisted-computed-columns

计算列可以帮助您将运行时计算成本转移到数据修改阶段。计算列与行其余部分一起存储，当计算列上的表达式与查询匹配时，将透明地使用它。您还可以在PCC上构建索引，以加快表达式的过滤和范围扫描。

Link

2008-09-29 17:00:54

TableDiff.exe

表差异工具允许您发现和协调源表和目标表或视图之间的差异。Tablediff实用程序可以报告模式和数据的差异。tablediff最受欢迎的特性是它可以生成一个脚本，您可以在目标上运行该脚本，以协调表之间的差异。

Link

2008-09-23 16:09:25

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

SQL Server的隐藏特性

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