自动为指定表的指定字段生成编号的存储过程
--根据日期自动生成编号
--格式:20070517000001
create procedure sp_BuildNumber(
@length int, --日期后面的编号长度
@fieldname nvarchar(20), --字段名称
@tablename nvarchar(20), --表名称
@return nvarchar(20) output --输出变量
)
as
begin
declare @sql nvarchar(2000)
set @sql='
declare @nowdate nvarchar(10)
declare @mincoding nvarchar(20)
declare @coding nvarchar(20)
set @nowdate=convert(nvarchar(10),getdate(),120)
set @nowdate=replace(@nowdate,''-'','''')
set @mincoding=@nowdate+replicate(''0'',@length-1)+''0''
select @coding=isnull(max('+@fieldname+'),@mincoding) from '+@tablename+' where '+@fieldname+' like @nowdate+''%''
set @return=convert(nvarchar,convert(numeric(18,0),@coding)+1)
'
exec sp_executesql @sql,N'@length int,@return nvarchar(20) output',@length,@return output
end
GO
--格式:20070517000001
create procedure sp_BuildNumber(
@length int, --日期后面的编号长度
@fieldname nvarchar(20), --字段名称
@tablename nvarchar(20), --表名称
@return nvarchar(20) output --输出变量
)
as
begin
declare @sql nvarchar(2000)
set @sql='
declare @nowdate nvarchar(10)
declare @mincoding nvarchar(20)
declare @coding nvarchar(20)
set @nowdate=convert(nvarchar(10),getdate(),120)
set @nowdate=replace(@nowdate,''-'','''')
set @mincoding=@nowdate+replicate(''0'',@length-1)+''0''
select @coding=isnull(max('+@fieldname+'),@mincoding) from '+@tablename+' where '+@fieldname+' like @nowdate+''%''
set @return=convert(nvarchar,convert(numeric(18,0),@coding)+1)
'
exec sp_executesql @sql,N'@length int,@return nvarchar(20) output',@length,@return output
end
GO
调用例子(订单编号):
declare @number nvarchar(20)
exec sp_BuildNumber 6,'OrderNumber','Orders',@number output
exec sp_BuildNumber 6,'OrderNumber','Orders',@number output
可根据需要更改输出格式。