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ÎÒµÄCardID×Ö¶ÎÀï±£´æÓÐHM-CQ-050202-0001£¨ÆäÖÐ050202ÊDzúÆ·±àºÅ£¬0001ÊÇÁ÷Ë®ºÅ£©£¬»¹ÓÐ
HM-CQ-050404-0001¡¢
HM-CQ-100202-0001¡¢
HM-CQ-100404-0001¡¢
HM-CQ-200202-0001¡¢
HM-CQ-200404-0001¡¢ÕâЩ±àºÅ£¬ÎÒÔÚÌí¼ÓµÄʱºò£¬ÈçºÎÅжϷֱð¸ù¾Ý´ÓÊý¾Ý¿âÀï¶Á³öÀ´µÄÁ÷Ë®ºÅ×Ô¶¯Ôö³¤ÄØ£¿ÎÒ·ÅÔÚÏÂÀ­±íÀïµÄ£¬¸ù¾ÝÏÂÀ­±íÑ¡ÔñµÄ¹æ¸ñ²»Í¬¶øÏÔʾµÄ±àºÅ²»Í¬¡£×öÁ˺þû¹ÊÇ×ö²»³öÀ´£¬Ö»ºÃÇëÉçÇø¸ßÊÖ°ï°ï棡ллÁË£¡£¡£¡
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SQL code:

if object_id('tb') is not null
drop table tb
go
create table tb(code nvarchar(20))
go
insert into tb values('HM-CQ-050404-0001')
insert into tb values('HM-CQ-100404-0001')

------------------------------------------------
if object_id('getCode') is not null
drop function getCode
go
create function dbo.getCode(@strPre nvarchar(20))
returns nvarchar (20)
as
begin
declare @id int
declare @code nvarchar(20)
select @id=1
if not exists(select top 1 1 from tb where left(code,12) = @strPre )
begin
select @code= @strPre+'-'+left('000'+ltrim(@id),4)

end
else
begin
select @code=@strPre+'-'+left('000'+ltrim(cast(max(right(code,4))+1 as int)),4) from tb

end
return (@code)
end
go
---------²âÊÔ
select dbo.getCo


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