取消隐藏特定表中的多个列

Question

我在执行时使用以下SQL脚本来取消数据我收到此错误：在UNPIVOT运算符中指定与UNPIVOT参数中的现有列名冲突。

 SELECT 
        HelpDeskName
        , TRY_CONVERT(NUMERIC(10,4),loggedInAgents) AS loggedInAgents
        , TRY_CONVERT(NUMERIC(10,4),AvailableAgents) AS AvailableAgents
        , TRY_CONVERT(NUMERIC(10,4),UnAvailableAgent) AS UnAvailableAgent
        , TRY_CONVERT(NUMERIC(10,4),TotalCalls) AS TotalCalls
        , TRY_CONVERT(NUMERIC(10,4),CallsHandled) AS CallsHandled
        , ReceivedTime
    FROM [Final].[UCCX]  AS U
    UNPIVOT
        (

            HelpDeskName,
            ReceivedTime
            for Category in (LoggedInAgents,AvailableAgents,UnAvailableAgent,TotalCalls,CallsHandled)
        ) Z ;

我希望看到的unpivot的输出列是HelpDeskName，ReceivedTime，Category，CategoryValue。请提供建议或帮助解决此查询。

Answer 1

两个快速选项

选项1 - 通过交叉申请

Cross Apply方法提供了更多的自由度/灵活性。例如，您可以轻松地重命名类别或重新投射值。

Select A.HelpDeskName
      ,A.RecievedTime
      ,B.*
 From  YourTable A
 Cross Apply (values ('LoggedInAgents'   ,A.LoggedInAgents)
                    ,('AvailableAgents'  ,A.AvailableAgents)
                    ,('UnavailableAgents',A.UnavailableAgents)
                    ,('TotalCalls'       ,A.TotalCalls)
                    ,('CallsHandled'     ,A.CallsHandled)
             ) B (Category,CategoryValue)

选项2 - 通过UnPivot

Select HelpDeskName,RecievedTime,Category,CategoryValue
 From  YourTable
UnPivot ( CategoryValue For Category in (LoggedInAgents,AvailableAgents,UnavailableAgents,TotalCalls,CallsHandled) ) u;

两者都会返回类似

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