Question

如果2018年的销售额为0，我需要将2019年的销售额放入一个名为new的单独列中。在这里我的代码供您参考

SELECT 
    ISNULL(sp.Telephone,'No Sales Employee'),
    od.CardCode,
    od.CardName,
    Sum(case when c.U_ItemStatus = '2' then od.DocTotal else 0 end) as Sold2018,
    Sum(case when c.U_ItemStatus = '1' then od.DocTotal else 0 end) as Sold2019,
    (select od.DocTotal where c.U_ItemStatus = '2' ) as new
FROM
    ORDR od
Left Join OSLP sp
    On od.SlpCode=sp.SlpCode
left join RDR1 a on a.DocEntry = od.DocEntry
left join OITM b on b.ItemCode = a.ItemCode
left Join OITB c on c.ItmsGrpCod = b.ItmsGrpCod
Group By
    sp.Telephone,
    od.CardCode,
    od.CardName,
    c.U_ItemStatus,
    od.DocTotal

Answer 1

使用CASE语句，请注意，您需要在条件中使用Sold2018的整个表达式，而不是alias

CASE WHEN Sum(case when c.U_ItemStatus = '2' then od.DocTotal else 0 end) = 0 
     THEN Sum(case when c.U_ItemStatus = '1' then od.DocTotal else 0 end)
     END  AS New

Answer 2

您可以使用

SELECT 
    ISNULL(sp.Telephone,'No Sales Employee') ,
    od.CardCode,
    od.CardName,
    Sum(case when c.U_ItemStatus = '2' then od.DocTotal else 0 end) as Sold2018,
    Sum(case when c.U_ItemStatus = '1' then od.DocTotal else 0 end) as Sold2019,
    CASE WHEN Sum(case when c.U_ItemStatus = '2' then od.DocTotal else 0 end) = 0 THEN 
              Sum(case when c.U_ItemStatus = '1' then od.DocTotal else 0 end) END as new
FROM
    ORDR od
Left Join OSLP sp
    On od.SlpCode=sp.SlpCode
left join RDR1 a on a.DocEntry = od.DocEntry
left join OITM b on b.ItemCode = a.ItemCode
left Join OITB c on c.ItmsGrpCod = b.ItmsGrpCod
Group By
    sp.Telephone,
    od.CardCode,
    od.CardName,
    c.U_ItemStatus

或

SELECT *, CASE WHEN Sold2018 = 0 THEN Sold2019 END as new 
FROM (
    SELECT 
        ISNULL(sp.Telephone,'No Sales Employee') as Telephone,
        od.CardCode,
        od.CardName,
        Sum(case when c.U_ItemStatus = '2' then od.DocTotal else 0 end) as Sold2018,
        Sum(case when c.U_ItemStatus = '1' then od.DocTotal else 0 end) as Sold2019     
    FROM
        ORDR od
    Left Join OSLP sp
        On od.SlpCode=sp.SlpCode
    left join RDR1 a on a.DocEntry = od.DocEntry
    left join OITM b on b.ItemCode = a.ItemCode
    left Join OITB c on c.ItmsGrpCod = b.ItmsGrpCod
    Group By
        sp.Telephone,
        od.CardCode,
        od.CardName,
        c.U_ItemStatus
) AS T

如何在sqlserver2014中使用case将两列数据转换为一列？

2 个答案: