复制代码 代码如下: ALTER function [dbo].[GetOrderNum]( @ebaystockflag varchar(20)//规则字母 ) returns varchar(100) AS BEGIN declare @dt CHAR(8) declare @flag varchar(20) set @flag='B'+@ebaystockflag set @dt=CONVERT(CHAR(8),GETDA
复制代码 代码如下: ALTER function [dbo].[GetOrderNum]( @ebaystockflag varchar(20)//规则字母 ) returns varchar(100) AS BEGIN declare @dt CHAR(8) declare @flag varchar(20) set @flag='B'+@ebaystockflag set @dt=CONVERT(CHAR(8),GETDATE(),112) declare @max varchar(100) SELECT @max=MAX(OrderNumber) FROM tb_EbayOrder WITH(XLOCK,PAGLOCK) WHERE OrderNumber like @flag+'%' set @max=isnull(@max, @flag+@dt+'000')--查不到结果给个默认值 declare @a varchar(100) declare @num varchar(10) declare @ordernum varchar(20) set @a=Convert(varchar,right(@max,len(@max)-10))--截取数字部分 if(LEFT(@a,1)=0)--以0开头 begin if(SUBSTRING(@a,2,1)=0)--有两个0 begin set @num=Convert(varchar,SUBSTRING(@a,3,LEN(@a-2))+1) end else if(SUBSTRING(@a,3,1)=0 and SUBSTRING(@a,2,1)=0)--有三个0 begin set @num=1 end else begin --只有一个0的情况 set @num=Convert(int,SUBSTRING(@a,2,LEN(@a))+1) end end else begin --数字大于100的情况 set @num=Convert(varchar,@a+1) end if(LEN(@num)=1)--截取后不满三位的补0 begin set @num='00'+@num end if(LEN(@num)=2) begin set @num='0'+@num end set @ordernum=@flag+@dt+@num return @ordernum END 调用：在事务中先锁定要操作的表 复制代码 代码如下: SELECT * FROM tb_EbayOrder WITH (TABLOCKX) SELECT * FROM tb_EbayOrderList WITH (TABLOCKX) SELECT * FROM tb_EbayOrderUserInfo WITH (TABLOCKX) 调用：select dbo.GetOrderNum(@ebaystockflag)
