我正在使用SQL Management Studio2012。我遇到“遇到零除错误”错误。我知道这需要使用NULLIF,但是我不确定如何在查询中使用它。
这是我的查询
select
Ward,
LocalAuthority,
Fiscal,
DR,
cast(DR*100.0 /SUM(DR) OVER (
partition by localauthority, fiscal
order by fiscal asc) as Decimal (10,2)) as [DR%]
from (
select
Fiscal,
LocalAuthority,
Ward,
sum(case when code = 'DR' then 1 else 0 end) as DR
from [dbo].[Table]
where datetimeofcall >= '2014-04-01'
group by
ward,
localauthority,f
fiscal
) as A
我实际上已经问过这个问题,在这个问题之前,有一个好人回答得很好,但是那没有OVER()和SUM聚合函数,我陷入了语法混乱。我一直在尝试以下各种含义,但没有成功。
cast(DR*100.0 /NULLIF(SUM(DR,0),1) OVER(partition by localauthority,fiscal order by fiscal asc) as Decimal (10,2)) as [DR%]
答案 0 :(得分:1)
使用const
来标识先前的0
Case Expression