存储过程生成流水号

格式如A20110915001，第1位写死A，2-5位为年，6-7位为月，8-9位为日，最后三位为流水号.

/****** Object: StoredProcedure [dbo].[usp_SaleRetrun_CreateAutoApplyBatchId] Script Date: 02/07/2012 09:55:40 ******/

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER OFF

GO

CREATE PROCEDURE [dbo].[usp_CreateAutoBatchId]

AS

BEGIN

SET NOCOUNT ON;

declare @oldValue varchar(12)

declare @newValue varchar(12)

declare @newCode varchar(3)

declare @oldCode varchar(3)

declare @oldYearMonthDay varchar(9)

declare @newYearMonthDay varchar(9)

set @newYearMonthDay = CONVERT(varchar(8), GETDATE(), 112)

set @newYearMonthDay ='R'+@newYearMonthDay

select @oldValue = pValue from Parameter with (rowlock) where pName='Program_Batch_Id' and pActive='Y'

set @oldYearMonthDay = substring(@oldValue,1,9)

set @oldCode = substring(@oldValue,10,3)

if @newYearMonthDay = @oldYearMonthDay
--如果新的年月日编号与旧的相同

begin

-- 旧序号＋1

set @newCode = cast(cast(@oldCode as int)+1 as varchar(3))

while len(@newCode)<3

begin

set @newCode = '0' + @newCode

end

set @newValue = @oldYearMonthDay + @newCode

end

else --采用新的年月编号，序号从"001"开始

begin

set @newCode = '001'

set @newValue = @newYearMonthDay + @newCode

end

Begin transaction --开始事务

update Parameter with (rowlock) set pValue = @newValue where pName='Program_Batch_Id' and pActive='Y'

if @@ERROR > 0

ROLLBACK

Else

COMMIT

END

GO