sql - 员工 ID 自动生成带前缀

Question

我很困惑我希望员工 ID 是自动生成的前缀格式我知道在 sql server 中触发之前是可能的我正在关注帖子 http://www.aspdotnet-suresh.com/2012/04/set-custom-auto-generatedincrement.html

USE [test1]
GO

/****** Object:  Table [dbo].[Users]    Script Date: 03/08/2013 12:28:08 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

SET ANSI_PADDING ON
GO

CREATE TABLE [dbo].[Users](
    [UserId] [varchar](50) NOT NULL,
    [UserName] [varchar](50) NULL,
    [LastName] [varchar](50) NULL,
    [Location] [varchar](50) NULL,
 CONSTRAINT [PK_Users] PRIMARY KEY CLUSTERED 
(
    [UserId] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]

GO

SET ANSI_PADDING OFF
GO

显示是

    UserId  UserName    LastName    Location
08U13000    SureshDasari    Dasari  Chennai
08U13001    SureshDasari    Dasari  Chennai
08U13002    SureshDasari    Dasari  Chennai
08U13003    SureshDasari    Dasari  Chennai
08U13004    SureshDasari    Dasari  Chennai
08U13005    SureshDasari    Dasari  Chennai
08U13006    SureshDasari    Dasari  Chennai
08U13007    SureshDasari    Dasari  Chennai
08U13008    SureshDasari    Dasari  Chennai
08U13009    SureshDasari    Dasari  Chennai
08U13010    SureshDasari    Dasari  Chennai
08U13011    SureshDasari    Dasari  Chennai
08U13012    SureshDasari    Dasari  Chennai
08U13013    SureshDasari    Dasari  Chennai
08U13014    SureshDasari    Dasari  Chennai
08U13015    SureshDasari    Dasari  Chennai

How to automatically create the primary key that has the following series A001000001 ... A001xxxxxx in SQL?

但我想在触发前插入这个触发器在同一个表和同一行中工作前 -

INSERT INTO Users (UserName,LastName,Location) VALUES('SureshDasari','Dasari','Chennai')

和用户 ID 自动创建？喜欢--08U13015,08U13014

我是从insert into inserted table做的但是错误不能insert in inserted or deleted table
或任何其他方法请帮我提前致谢

Answer 1

@marc_s提供的答案问题是如何做到这一点。

在您的情况下，它看起来像这样:

create table Users
(
  Id int identity (3000, 1),
  UserId as '08U1'+right('0000'+cast(Id as varchar(5)), 5) persisted,
  UserName varchar(50),
  LastName varchar(50),
  Location varchar(50),
  constraint PK_Users primary key (UserId)
)

我不会像建议的那样做 here .如果您曾经删除一行或在并发的情况下，您将有重复项。

SQL Fiddle