需要帮助汇总选择

Question

我有一个问题，从我的数据库中选择一些值。数据库处于设计阶段，所以我可以重新设计一些需要的。

你可以看到Diagram on this image

基本上我要选择的是

select 
c.campaignID, 
ct.campaignTypeName, 
c.campaignName, 
c.campaignDailyBudget, 
c.campaignTotalBudget, 
c.campaignCPC, 
c.date, 
cs.campaignStatusName 
***impressions, 
***clicks, 
***cast(campaignTotalBudget-(clicks*campaignCPC) as decimal(18,1)) as remainingFunds 
from Campaigns as c 
left join CampaignTypes as ct on c.campaignTypeID=ct.campaignTypeID 
left join CampaignStatuses as cs on c.campaignStatusID=cs.campaignStatusID 
left join CampaignVariants as cv on c.campaignID=cv.campaignID 
left join CampaignVariants2Visitors as c2v on cv.campaignVariantID=c2v.campaignVariantID 
left join Visitors as v on c2v.visitorID=v.visitorID 
..... 
order by c.campaignID desc 

问题是，参观者表已任命isClick列，所以我不知道分开是什么印象的方式isClick = false，点击是什么isClick = true，所以我可以显示所有关于广告系列和访问者的好表单...

我不认为要将访问者分成两个表格，如印象和点击是一个好主意因为再次乌尔德需要有游客多了两桌

感谢

Answer 1

目前还不清楚什么是“印象”是你图所示。但是，如果您想知道如何计算每个广告系列的点击次数，则可以执行以下操作：

Select ... 
From Campaigns As c 
    ... 
    Left Join (
       Select V1.VisitorId 
        , CV2V1.CompaignVariantID 
        , Sum(Case When V1.IsClick = 1 Then 1 Else 0 End) As ClickCount 
        , Count(*) TotalVisitorCount 
       From Visitors As V1 
        Join CompaignVariant2Visitors As CV2V1 
         On CV2V1.VisitorId = V1.VisitorID 
       Group By V1.VisitorId, CV2V1.CompaignVariantID 
       ) As VisitTotals 
     On VisitTotals.VisitorId= C2V.VisitorId 
      And VisitTotals.CampaignVariantID = C2V.CampaignVariantID 
... 
Order By c.campaignID desc