Question

请在下面找到表格结构

table A      Table B
10              10
20              10
30              0
40              0

我想分开A / B. 如果有30/0我想把它显示为0。

我希望像

一样输出

O/P
1
2
0
0

我们怎么能这样做？

Table structure queries:
create table #test1(id int)

insert into #test1 values(10)
insert into #test1 values(20)
insert into #test1 values(30)
insert into #test1 values(40)

select top 100 * from #test1

create table #test2(id int)

insert into #test2 values(10)
insert into #test2 values(10)
insert into #test2 values(0)
insert into #test2 values(0)

select top 100 * from #test2

Answer 1

试试这个

SELECT A.id,B.id, IIF(B.id<>0,A.Id/B.ID,0) AS ExpectedResult,
       COALESCE( A.id/NULLIF(B.ID,0),0)  AS ExpectedResult2
FROM
(
SELECT Id,ROW_NUMBER()OVER(Order BY ID) As Seq FROM #test1
)As A
INNER JOIN 
(
SELECT Id,ROW_NUMBER()OVER(Order BY ID DESC) As Seq FROM #test2)AS B
ON A.Seq=B.Seq

结果

 id id  ExpectedResult  ExpectedResult2
10  10     1                    1
20  10     2                    2
30  0      0                    0
40  0      0                    0

Answer 2

尝试此查询：

select A, B, case B when 0 then B else A/B end [A/B]
from (values (10,10),(20,10),(30,0),(40,0)) tbl(A,B)

以上查询使用case语句在0时返回B = 0并在B <> 0时分开。

如何克服以下查询中的除零误差

2 个答案: