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

这不是一个隐藏的功能,而是在管理工作室的工具\选项\键盘下设置键映射: Alt+F1默认为sp_help“选定的文本”,但我不能没有添加Ctrl+F1为sp_helptext“选定的文本”

其他回答

Use

从information_schema中选择*

列出所有的数据库,基本表,sps,视图等在SQL server。

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

使用osql实用程序运行命令行查询/脚本/批处理

好吧,这是我剩下的一些,很遗憾我错过了开始,但继续吧,这里有一些顶级的东西!

查询分析器

Alt+F1对所选文本执行sp_help Alt-D -聚焦到数据库下拉菜单,这样你就可以使用字母光标键选择db。

t - sql

if (object_id("nameofobject") IS NOT NULL) begin <do something> end -最简单的存在性检查 Sp_locks——比sp_who2(这是第一个调用端口)更深入的锁定信息 DBCC inputbuffer(spid) -执行进程的顶部行列表(有点有用,但简单) DBCC outputbuffer(spid) -执行进程输出的顶行列表

通用T-sql技巧

对于大容量的数据,可以自由地使用子查询来处理集合中的数据

例如,获得已婚人士的名单 50岁以上的人可以选择 一群结婚的人 子查询并与一组 同样是50岁以上的人 加入结果-请原谅 的例子

这里有一个简单但有用的例子:

手动编辑表内容时,可以通过输入Control-0在列中插入NULL。