根据一定原则自动生成序列号的具体示例

• 数据库

需求：

◆1、生产收货时，在数量处按CTRL+TAB，在序列号录入处按ShiFT+F2,能自动生成序列号；

◆2、生成原则如下：0703MG51T-09-S05-1200#001，其中0703为年月代码，MG51T-09-S05-1200为物料号，#号为分隔符，001为本月第一笔收货，以后自动加1。

我的语句如下：

declare @t1 as varchar(32)

declare @t2 as varchar(32)

declare @itemcode as varchar(20)

declare @y as varchar(20)

declare @m as varchar(20)

declare @ml as integer

declare @qty1 as varchar(3)

declare @maxid as varchar(3)

declare @tid as varchar(3)

select @itemcode=rtrim($[$43.5.0])

select @y=substring(cast(year(getdate()) as varchar),3,2)

select @m=cast(month(getdate()) as varchar)

select @ml=len(Rtrim(@m))

if @ml=1

select @m='0'+@m

else select @m=@m

select @t1=Ltrim(@y+@m+@itemcode)

select @qty1=isnull(count(*),0) from OSRI where ItemCode=@itemcode and substring(IntrSerial,1,4)=@y+@m

if Rtrim(@qty1)='0'

begin

select @tid='001'

end

else

begin

select @maxid=cast(isnull(max(cast(substring(IntrSerial,len(Rtrim(IntrSerial))-2,3) as float)),0) as float)+1 from OSRI where ItemCode=Rtrim(@itemcode) and substring(IntrSerial,1,4) 1000 =@y+@m

if len(Rtrim(@maxid))=0

begin

select @tid='001'

end

if len(Rtrim(@maxid))=1

begin

select @tid='00'+cast(Rtrim(@maxid) as char(1))

end

if len(Rtrim(@maxid))=2

begin

select @tid='0'+cast(Rtrim(@maxid) as char(2))

end

if len(Rtrim(@maxid))=3

begin

select @tid=cast(Rtrim(@maxid) as char(3))

end

end

select @t2=@t1+'#'+@tid

select @t2