用SQL生成流水号
用SQL生成流水号
转：韦江涛 发表于2010年02月03日 09:38 阅读(4) 评论(0)
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[fn_FillNumberWithZero]') and xtype in (N'FN', N'IF', N'TF'))
drop function [dbo].[fn_FillNumberWithZero]
GO
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[fn_FormatDate]') and xtype in (N'FN', N'IF', N'TF'))
drop function [dbo].[fn_FormatDate]
GO
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[fn_GetNewFlowNumber]') and xtype in (N'FN', N'IF', N'TF'))
drop function [dbo].[fn_GetNewFlowNumber]
GO
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[fn_GetNowDate]') and xtype in (N'FN', N'IF', N'TF'))
drop function [dbo].[fn_GetNowDate]
GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS OFF
GO
/*
生成流水号后面几位数字字符的相关函数
不足位数在左边用0填充
*/
CREATE FUNCTION dbo.fn_FillNumberWithZero
(
--填充的数字
@num int,
--总位数
@len int
)
RETURNS varchar(50) AS
BEGIN
--如果传入的流水号大于总的长度，那么直接返回流水号字符串格式
if(len(Convert(varchar(50),@num))>@len)
return Convert(varchar(50),@num)
ELSE
BEGIN
--需要填充0的位数
declare @NeedFillLen int
set @NeedFillLen=@Len-len(Convert(varchar(50),@num))
--获取需要填充的0的字符串
declare @i int
set @i=0
declare @temp varchar(50)
set @temp=N''
while @i<@NeedFillLen
BEGIN
SET @temp=@temp+'0'
SET @i=@i+1
END
--返回组后的字符串
return @temp+Convert(varchar(50),@num)
END
return ''
END
GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER OFF
GO
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