选择不同案例查询

Question

我有以下查询

SELECT Distinct dbo.WSUS_ComputerUpdateStatusWithApprovals.fulldomainname AS [Computer Name]
  ,dbo.WSUS_ComputerUpdateStatusWithApprovals.title AS [Update Title]
  ,count((case when (DATEDIFF(day, [ArrivalDate], GetDate())) > '0' and (DATEDIFF(day, [ArrivalDate], GetDate())) < '31' Then '' End)) AS 'Green'
  ,count((case when (DATEDIFF(day, [ArrivalDate], GetDate())) > '31' and (DATEDIFF(day, [ArrivalDate], GetDate())) < '91' then '' End)) AS 'Yellow'
  ,count((case when (DATEDIFF(day, [ArrivalDate], GetDate())) > '90' then '' End)) AS 'Red'
  ,DATEDIFF(day, [ApprovalCreationDate], GetDate()) AS 'DaysOldSinceApproval'
FROM dbo.WSUS_ComputerUpdateStatusWithApprovals 
WHERE dbo.WSUS_ComputerUpdateStatusWithApprovals.IsApproved = 1 
Group by dbo.WSUS_ComputerUpdateStatusWithApprovals.fulldomainname 
,[ArrivalDate] 
,dbo.WSUS_ComputerUpdateStatusWithApprovals.ApprovalCreationDate
,dbo.WSUS_ComputerUpdateStatusWithApprovals.title
ORDER BY  dbo.WSUS_ComputerUpdateStatusWithApprovals.fulldomainname ASC

结果集是这样出来的：

我希望它显示计算机名称和每个绿色、黄色、红色的总数。所以在这种情况下，计算机名称，绿色 = 3，黄色 = 1 和红色 = 1。我包括标题和天数以显示更多信息。

Answer 1

如果我没听错的话，你只需要更改group by 子句，让它为每个fulldomainname 生成一行：

select 
    fulldomainname AS [Computer Name],
    sum(case when datediff(day, [ArrivalDate], GetDate()) between 1  and 30 then 1 else 0 end) AS Green,
    sum(case when datediff(day, [ArrivalDate], GetDate()) between 30 and 90 then 1 else 0 end) AS Yellow,
    sum(case when datediff(day, [ArrivalDate], GetDate()) > 90              then 1 else 0 end) AS Red
from dbo.WSUS_ComputerUpdateStatusWithApprovals 
where IsApproved = 1 
group by fulldomainname 
order by fulldomainname ASC

请注意，我将条件聚合逻辑更改为使用sum() 而不是count()，因为它看起来更容易理解。