Question

我有一个订单表，我想显示一个报告，显示从单个表中拒绝的月份，总订单和总订单。

该表有我想要使用的dtcomplete，rtpID和supplierReject，这几乎让我在那里但是1月份应该只有1个拒绝显示，我希望子查询只检查分组的月份

select datename(month, dtComplete) as Month, count(rtpID) as TotalOrders,
(select count(*) from RTPMaindetails where SupplierRejected = 1 and  datename(month, dtComplete) = datename(month, RTPMaindetails.dtComplete) group by datepart(month,dtcomplete) ) as Rejects
from RTPMaindetails
where datepart(year,dtComplete) = 2017 
group by datepart(month,dtcomplete),datename(month, dtComplete)
order by datepart(month,dtcomplete)

节目：

Month    TotalOrders    Rejects
January    515             1
February   308             1
March      156             1

应该显示

Month    TotalOrders    Rejects
January    515             1
February   308             0
March      156             0

Answer 1

这可能取决于您使用的DBMS，但大多数应该支持这样的内容：

select datename(month, dtComplete) as Month
     , count(rtpID) as TotalOrders,
     , count(case when SupplierRejected = 1 then rtpID end) as Rejects
  from RTPMaindetails
 where datepart(year,dtComplete) = 2017 
 group by datepart(month,dtcomplete),datename(month, dtComplete)
 order by datepart(month,dtcomplete)

Answer 2

您可以使用单个查询

select 
    datename(month, dtComplete) as Month
  , count(rtpID) as TotalOrders
  , sum( case when SupplierRejected = 1  then 1 else 0 ) as Rejects
from RTPMaindetails
where datepart(year,dtComplete) = 2017 
group by datepart(month,dtcomplete)
order by datepart(month,dtcomplete)

在单个查询

2 个答案: