SQL查询：按月，县，和程序的申请数量

Question

我需要生成支出清单&按月申请的数量，县&程序。到目前为止，我已经能够获得支出清单，但我无法获得每月申请数量的列表。这是我迄今为止的查询，但应用程序的数量不正确。

select 
servicecounty AS County, 
program, 
sum(case when month(entrydate) = 1 and year(entrydate) = 2014 then totalpaymenttotal else 0 end) as January, 
sum(case when month(entrydate) = 2 and year(entrydate) = 2014 then totalpaymenttotal else 0 end) as February, 
sum(case when month(entrydate) = 3 and year(entrydate) = 2014 then totalpaymenttotal else 0 end) as March, 
sum(case when month(entrydate) = 4 and year(entrydate) = 2014 then totalpaymenttotal else 0 end) as April, 
sum(case when month(entrydate) = 5 and year(entrydate) = 2014 then totalpaymenttotal else 0 end) as May, 
sum(case when month(entrydate) = 6 and year(entrydate) = 2014 then totalpaymenttotal else 0 end) as June, 
sum(case when month(entrydate) = 7 and year(entrydate) = 2014 then totalpaymenttotal else 0 end) as July, 
sum(case when month(entrydate) = 8 and year(entrydate) = 2014 then totalpaymenttotal else 0 end) as August, 
sum(case when month(entrydate) = 9 and year(entrydate) = 2014 then totalpaymenttotal else 0 end) as September, 
sum(case when month(entrydate) = 10 and year(entrydate) = 2014 then totalpaymenttotal else 0 end) as October, 
sum(case when month(entrydate) = 11 and year(entrydate) = 2014 then totalpaymenttotal else 0 end) as November, 
sum(case when month(entrydate) = 12 and year(entrydate) = 2014 then totalpaymenttotal else 0 end) as December, 
sum(case when month(entrydate) = 1 and year(entrydate) = 2015 then totalpaymenttotal else 0 end) as [January 15], 
sum(case when month(entrydate) = 2 and year(entrydate) = 2015 then totalpaymenttotal else 0 end) as [February 15], 
sum(case when month(entrydate) = 3 and year(entrydate) = 2015 then totalpaymenttotal else 0 end) as [March 15], 
sum(case when month(entrydate) = 4 and year(entrydate) = 2015 then totalpaymenttotal else 0 end) as [April 15] 
from Sheet$ 
group by servicecounty, program 

UNION ALL 
select 
servicecounty AS County, 
program, 
COUNT(case when month(entrydate) = 1 and year(entrydate) = 2014 then ApplicationID else 0 end) as January, 
count(case when month(entrydate) = 2 and year(entrydate) = 2014 then ApplicationID else 0 end) as February, 
count(case when month(entrydate) = 3 and year(entrydate) = 2014 then ApplicationID else 0 end) as March, 
count(case when month(entrydate) = 4 and year(entrydate) = 2014 then ApplicationID else 0 end) as April, 
count(case when month(entrydate) = 5 and year(entrydate) = 2014 then ApplicationID else 0 end) as May, 
count(case when month(entrydate) = 6 and year(entrydate) = 2014 then ApplicationID else 0 end) as June, 
count(case when month(entrydate) = 7 and year(entrydate) = 2014 then ApplicationID else 0 end) as July, 
count(case when month(entrydate) = 8 and year(entrydate) = 2014 then ApplicationID else 0 end) as August, 
count(case when month(entrydate) = 9 and year(entrydate) = 2014 then ApplicationID else 0 end) as September, 
count(case when month(entrydate) = 10 and year(entrydate) = 2014 then ApplicationID else 0 end) as October, 
count(case when month(entrydate) = 11 and year(entrydate) = 2014 then ApplicationID else 0 end) as November, 
count(case when month(entrydate) = 12 and year(entrydate) = 2014 then ApplicationID else 0 end) as December, 
Count(case when month(entrydate) = 1 and year(entrydate) = 2015 then ApplicationID else 0 end) as [January 15], 
Count(case when month(entrydate) = 2 and year(entrydate) = 2015 then ApplicationID else 0 end) as [February 15], 
Count(case when month(entrydate) = 3 and year(entrydate) = 2015 then ApplicationID else 0 end) as [March 15], 
Count(case when month(entrydate) = 4 and year(entrydate) = 2015 then   ApplicationID else 0 end) as [April 15] 
from Sheet$ 
group by servicecounty, program 
ORDER BY program 

下面是报告中应该是什么样子：每月

支出，程序&县： http://i.stack.imgur.com/yJ26A.jpg

按月应用数量，计划&县： http://i.stack.imgur.com/7Aqkk.png

该表包含以下字段：ServiceCounty，TotalPaymentTotal，Program，ApplicationID，EntryDate

在此先感谢您的帮助。

Answer 1

您在第二个子查询中的计数都返回相同的值。请记住，count()计算非NULL值的数量。并且，0不为空。

三种解决方案：

• 更改count()到sum()和then到then 1。
• 删除else。
• 将else 0更改为else NULL。

这些都是我个人的偏好。