SQL SERVER存储过程生成字母+数字的编码

 1 --测试数据库准备
 2 use master
 3 go
 4 if exists(select * from dbo.sysdatabases where name=‘hzf‘)
 5 drop database hzf
 6 go
 7 create database hzf
 8 go
 9 use hzf
10 go
11 --创建测试表
12 ALTER proc [dbo].[get_new_id] 
13     @new_id varchar(16) output,    --生产的编号
14     @number int,                --设置编码数字的最大位数
15     @group varchar(5)            --编号字母
16 as
17 begin
18  
19     set @new_id = null
20      
21     select top 1 @new_id = ID from test_id where id like @group+‘%‘ order by convert(int,RIGHT(id,LEN(id)-len(@group)) ) desc
22      
23     if @new_id is null
24         set @new_id = @group+REPLICATE(‘0‘,2)+‘1‘
25     else
26         begin
27             declare @big varchar(16)
28             set @big = convert(int, RIGHT(@new_id,LEN(@new_id)-len(@group)) )+1 
29             if @big <100
30             begin
31                 set @big = REPLICATE(‘0‘,3-LEN(@big)) + @big
32             end
33             set @new_id = @group + @big 
34         end
35      
36  
37 end
38  
39 GO
40  
41 --测试
42 declare @test int
43 set @test=1
44 while(@test<=20)
45 begin
46     declare @new_id    varchar(14)
47     exec get_new_id @new_id output,7,‘PC‘
48     insert into test_id values(@new_id)
49     set @test = @test+1
50 end
51 select * from test_id