如果 SUM() 为零，则不返回行答案

【问题标题】：Don't return row if SUM() is zero如果 SUM() 为零，则不返回行
【发布时间】：2013-09-18 16:11:50
【问题描述】：

我有一个问题：

   SELECT DTH.PointPerson AS Person
          ,PDT.[Name] AS Project
          ,(CASE WHEN TSK.Name IS NULL THEN NULL
            WHEN SPT.[Name]+' - '+SPT.[Description] IS NULL THEN 'KanBan'
            ELSE SPT.[Name]+' - '+SPT.[Description]
            END) AS Sprint
          ,COALESCE(STY.[Number], NSS.IncidentNumber) AS Story
          ,TSK.[Name] AS Task
          ,SUM(CASE WHEN DATEPART(dw, DTH.ActivityDate) = 1 THEN DTH.[Hours] ELSE 0 END) AS Monday
          ,SUM(CASE WHEN DATEPART(dw, DTH.ActivityDate) = 2 THEN DTH.[Hours] ELSE 0 END) AS Tuesday
          ,SUM(CASE WHEN DATEPART(dw, DTH.ActivityDate) = 3 THEN DTH.[Hours] ELSE 0 END) AS Wednesday
          ,SUM(CASE WHEN DATEPART(dw, DTH.ActivityDate) = 4 THEN DTH.[Hours] ELSE 0 END) AS Thursday
          ,SUM(CASE WHEN DATEPART(dw, DTH.ActivityDate) = 5 THEN DTH.[Hours] ELSE 0 END) AS Friday
          ,SUM(CASE WHEN DATEPART(dw, DTH.ActivityDate) = 6 THEN DTH.[Hours] ELSE 0 END) AS Saturday
          ,SUM(CASE WHEN DATEPART(dw, DTH.ActivityDate) = 7 THEN DTH.[Hours] ELSE 0 END) AS Sunday
          ,SUM(DTH.[Hours]) AS Total
          FROM DailyTaskHours DTH
     LEFT JOIN Task TSK ON DTH.TaskId = TSK.PK_Task 
     LEFT JOIN Story STY ON TSK.StoryId = STY.PK_Story 
     LEFT JOIN NonScrumStory NSS ON DTH.NonScrumStoryId = NSS.PK_NonScrumStory 
     LEFT JOIN Sprint SPT ON STY.SprintId = SPT.PK_Sprint 
     LEFT JOIN Product PDT ON STY.ProductId = PDT.PK_Product
     GROUP BY  DTH.PointPerson, PDT.[Name], SPT.[Name]
               ,SPT.[Description]
               ,STY.[Number]
               ,NSS.IncidentNumber
               ,TSK.[Name]

如果：SUM(DTH.[Hours]) AS Total = 0 我希望不返回该行

我相信这种方法是使用 CASE WHEN，但我无法弄清楚它的确切位置。

【问题讨论】：

标签： sql sql-server

【解决方案1】：

在group by之后添加having子句：

HAVING SUM(DTH.[Hours]) <> 0

【讨论】：

【解决方案2】：

只需添加：

HAVING SUM(DTH.[Hours]) > 0

在查询结束时。

【讨论】：