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SQL Server 2008 R2——使用计算列为表创建自定义的自增列

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本文链接:http://www.cnblogs.com/wlsandwho/p/5075789.html

耻辱墙:http://www.cnblogs.com/wlsandwho/p/4206472.html

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没啥说的,鄙视那些无视版权随意抓取博文的爬虫小网站站长。

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自增列我很少用,因为我觉得虽然插入数据的时候很方便,但是在一些特殊情况下会很麻烦。

但是最近企鹅群里有人要这个,如图。

SQL Server 2008 R2——使用计算列为表创建自定义的自增列

“每过一年从001开始”这里我没实现,这需要在计算列中调用自定义函数或者其他的什么东西来实现“NNN”的计数。我这里只是简单的用一个自增INT来代替。

(其实既然已经采用了“yyyymmddhhmmssNNN”这种奇葩的格式,新年是不是从001开始已经不重要了。)

一看这就是拍大腿想出来的表结构。

如果一直拦着想作死的青年,他就不会知道自己的行为有多可怕。可以的话还是让他作一回死吧。

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上代码。

 1 --by WLS 2 --网络代码有风险 3 --复制粘贴须谨慎 4 USE tempdb 5 GO 6  7 IF OBJECT_ID('t_TestbyWLS','U') IS NOT NULL 8 DROP TABLE t_TestbyWLS 9 GO10 11 CREATE TABLE t_TestbyWLS(DumyId INT IDENTITY(1,1),12             SN AS (REPLACE(replace(replace(convert(NVARCHAR,getdate(),120),'-',''),' ',''),':','')+RIGHT('00'+CAST(DumyId AS NVARCHAR),3)),13             Name NVARCHAR(50))14 GO15 16 INSERT INTO t_TestbyWLS(Name) VALUES('thbytwo')17 INSERT INTO t_TestbyWLS(Name) VALUES('wlsandwho')18 INSERT INTO t_TestbyWLS(Name) VALUES('shawbytwo')19 INSERT INTO t_TestbyWLS(Name) VALUES('wls')20 INSERT INTO t_TestbyWLS(Name) VALUES('No zuo no die,why you try!')21 GO22 SELECT * FROM  t_TestbyWLS23 GO

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DumyId列作为辅助字段。效果图:

SQL Server 2008 R2——使用计算列为表创建自定义的自增列

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也没什么原理好讲的,都是手册上的东西。

SQL Server 2008 R2——使用计算列为表创建自定义的自增列

还是对文中代码的知识点做个截图吧。

1 不能使用DEFAULT:

SQL Server 2008 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写“Server.aspx' >SQL Server 2008 R2——XXXXX”这个系列的目的有2个:

1 回答群内新手和部分伸手党的问题,顺便练手,以后再有人问就可以让他自己看链接。

2 某些问题在网上比较难找资料,或者找到的资料不靠谱(跟风转载不加验证),亦或者该问题根本就找不到资料,这个系列算是填坑的。

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现在的年轻人真是越来越浮躁了。
好吧,这就是你们一直想要的东西,拿好。

SQL Server 2008 R2——使用计算列为表创建自定义的自增列

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SQL Server 2008 R2——使用计算列为表创建自定义的自增列

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原标题:SQL Server 2008 R2——使用计算列为表创建自定义的自增列

关键词:sql

sql
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