Question

我有一张这样的表：

Table view

RP Type列指定费率计划的类型，可以是（低，高，正常）

我想创建一个视图，在其中我可以看到每个订阅者的数量＆＃39;这可能是高，正常，低。

我猜应该是这样的：

Create view t as 
   select 
       SubID, 
       Count(something) as NumeOfHIGH, 
       Count(Something) as NumOfLOW,
       Count(Something) as NumOfNormal
   Group by SubID

我可能错了。谢谢你

Answer 1

您可以通过以下方式形成查询：

SELECT SubID,
    SUM (
        CASE 
            WHEN RP_Type='High' THEN 1 
            ELSE 0 END
    ) AS NumOfHigh,
    SUM (
        CASE 
            WHEN RP_Type='Low' THEN 1 
            ELSE 0 END
    ) AS NumOfLow,
    SUM (
        CASE 
            WHEN RP_Type='Normal' THEN 1 
            ELSE 0 END
    ) AS NumOfNormal
FROM 
    <table_name>
Group by SubID

如果高，低和普通类别中分别有多个RP_Type，则可以在每个类别中添加WHEN。

有关更多信息和参考：Conditional Processing using CASE

Answer 2

我试过这个：

            select  SubscriberID
           ,COUNT(*) AS NumOfPlans
           ,SUM([SP active days]) as ActiveDays
           ,SUM(Case when [RP Type]='low' then 1 else 0 end ) as #LowPlan 
           ,SUM(Case when [RP Type]='high' then 1 else 0 end ) as #NormalPlan
           ,SUM(Case when [RP Type]='high' then 1 else 0 end ) as #HighPlan
           ,SUM(Case when [RP Type]='promotion' then 1 else 0 end ) as #PromotionsPlan
           ,SUM(Case when [RP Type]='portal' then 1 else 0 end ) as #PortablePlan
           ,SUM(Case when [RP Type]='newyear' then 1 else 0 end ) as #NewYearPlan
           ,SUM(Case when [RP Type]='hamaval1' then 1 else 0 end ) as #HamrahAval1Plan
           ,SUM(Case when [RP Type]='hamaval2' then 1 else 0 end ) as #HamrahAval2Plan
           ,SUM(Case when [RP Type]='samsung' then 1 else 0 end ) as #SamsungPlan
           ,SUM(Case when [RP Type]='DEMO' then 1 else 0 end ) as #DemoPlan
           ,SUM(Case when [RP Type]IS null then 1 else 0 end ) as #NuLL
           ,SUM([Extra Quota]) as SumGIG
           from [Cus Consumption].[dbo].CustData
           where [Expiry Date]<= '2014 - 01 - 15'
           group by [SubscriberID]

讽刺的是，我没有回答正确答案。我不知道为什么@Rohit Aggrawal

Answer 3

这有用吗？

   Create view t as 
       select From [tableName]
           [Rp Type],count(*) as NumberOfSubscribers
       Group by [Rp Type]

这将为您提供每种类型的订阅者数量，并键入

希望这有用

计算SQL Server中的特定单元格

3 个答案: