[摘要]一个朋友在展BOM的时候有这样的需求,两列字段(数值):A ,B A=用量,B=底数,组成用量=用量/底数。A/B,若能被整除,显示整除的结果,若不能整除显示分数形式A/B(分数形式要是约分后的格式)3/6=1/3。
我的思路:
1.SQL取余判断是否能被整除
2.撰写两个整形数值的最大公约数,然后分子与分母分别除以最大公约数。
其中进行转换化成字符串格式。
一、自定义最大公约数函数:
Create FUNCTION [dbo].[GetMaxgongyue] ( @num1 int , @num2 int ) RETURNS int as begin DECLARE @times INT DECLARE @min INT DECLARE @result BIGINT IF( @num1 >= @num2 ) SET @min=@num2 ELSE SET @min=@num1 SET @times=@min WHILE(@times <= @min ) BEGIN IF( @num1%@times = 0 AND @num2%@times = 0 ) BEGIN SET @result=@times BREAK END SET @times=@times - 1 END return @result end二、测试
drop table tt Create table tt(t1 int,t2 int) insert into tt(t1 ,t2 )values(1,3) insert into tt(t1 ,t2 )values(2,4) insert into tt(t1 ,t2 )values(3,9) insert into tt(t1 ,t2 )values(6,3) insert into tt(t1 ,t2 )values(4,2) insert into tt(t1 ,t2 )values(2,331) select t1,t2,t1%t2 取余, case when t1%t2<>0 and dbo.GetMaxgongyue(t1,t2)=1 then CAST(t1 as NCHAR(4))+‘/‘+ CAST(t2 as NCHAR(4)) when t1%t2<>0 and dbo.GetMaxgongyue(t1,t2)<>1 then CAST(t1/dbo.GetMaxgongyue(t1,t2) as NCHAR(4))+‘/‘+ CAST(t2/dbo.GetMaxgongyue(t1,t2) as NCHAR(4)) else cast(cast(t1/t2 as decimal(9,5)) as NCHAR(20)) end result from tt
原文地址:http://blog.csdn.net/david_520042/article/details/29611319