sql server中除法，会遇到除数为0的情况，且保留两位小数，写法如下：
select case when num=0 then 0 else convert(decimal(18,2),210.343/num) end as 结果 from tabNumber
select
[Carrier] as '承运人分组',
count(*) as '张数',
'0' as '出票效率',
sum(cast(SumPrice as int)) as '票面价',
sum(cast([TaxPrice] as int)) as '基建费',
sum(cast([OilPrice] as int)) as '燃油费',
sum(cast(SumPrice as int) - cast([FlightBack] as int)) as '实收费'
from [Order_FlightDetail] group by [Carrier] order by count(*) desc
select [Carrier] as '承运人分组',count(*) as '张数','0' as '出票效率',sum(convert(decimal(18,SumPrice)) as '票面价',[TaxPrice])) as '基建费',[OilPrice])) as '燃油费',SumPrice) - convert(decimal(18,[FlightBack])) as '实收费' from [Order_FlightDetail] where [Carrier] <>'' group by [Carrier] order by count(*) desc
select case when num=0 then 0 else convert(decimal(18,2),210.343/num) end as 结果 from tabNumber
select
[Carrier] as '承运人分组',
count(*) as '张数',
'0' as '出票效率',
sum(cast(SumPrice as int)) as '票面价',
sum(cast([TaxPrice] as int)) as '基建费',
sum(cast([OilPrice] as int)) as '燃油费',
sum(cast(SumPrice as int) - cast([FlightBack] as int)) as '实收费'
from [Order_FlightDetail] group by [Carrier] order by count(*) desc
select [Carrier] as '承运人分组',count(*) as '张数','0' as '出票效率',sum(convert(decimal(18,SumPrice)) as '票面价',[TaxPrice])) as '基建费',[OilPrice])) as '燃油费',SumPrice) - convert(decimal(18,[FlightBack])) as '实收费' from [Order_FlightDetail] where [Carrier] <>'' group by [Carrier] order by count(*) desc
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