Sql 自动产生编号

<br />declare @FlowNo nvarchar(50) declare @WTno nvarchar(50) declare @i int set @i = 0 declare @Y nvarchar(50) set @Y = substring(cast(year(getdate()) as nvarchar(50)),3,2) declare @M nvarchar(50) declare @Mi int set @Mi = cast(month(getdate()