Netezza行显示重复的列

Question

 

我正在尝试将行转置为列。 每个供应商一排，每年的毛利率为列。

这是给出的表：

 

SELECT 
SupplierName,
CASE WHEN YearID = 2018 THEN Shipping_cost ELSE NULL END SC_2018,
CASE WHEN YearID = 2017 THEN Shipping_cost ELSE NULL END SC_2017,
CASE WHEN YearID = 2016 THEN Shipping_cost ELSE NULL END SC_2016,

CASE WHEN YearID = 2018 THEN Retail_Percent_2018 ELSE NULL END Retail_2018,
CASE WHEN YearID = 2017 THEN Retail_Percent_2017 ELSE NULL END Retail_2017,
CASE WHEN YearID = 2016 THEN Retail_Percent_2016 ELSE NULL END Retail_2016

  FROM
    (
      SELECT 
      SUPL.SUP_NAM AS SupplierName,
      SUPL.SUPL_CST AS Shipping_cost,

        (SELECT SUM(Shipping_Cost) FROM MM_TRX_TABLE S
        WHERE YearID = '2018') AS GRANDTOTAL_2018,

        (SELECT SUM(Shipping_Cost) FROM MM_TRX_TABLE S
        WHERE YearID = '2017')  AS GRANDTOTAL_2017,

         (SELECT SUM(Shipping_Cost) FROM MM_TRX_TABLE S
        WHERE YearID = '2016')  AS GRANDTOTAL_2016,

      SUM(SUPL.Retail_Cost) AS Retail_Total, 

      CASE WHEN YearID = 2018 
      THEN (Retail_Total/GRANDTOTAL_2018) * 100 
      ELSE NULL END AS Retail_Percent_2018,         

      CASE WHEN YearID = 2017 
      THEN (Retail_Total/GRANDTOTAL_2017) * 100 
      ELSE NULL END AS Retail_Percent_2017,         

      CASE WHEN YearID = 2016 
      THEN (Retail_Total/GRANDTOTAL_2016) * 100 
      ELSE NULL END AS Retail_Percent_2016,      

     FROM MM_TRX_TABLE S
      WHERE YEARID IN ('2018', '2017', '2016')

      GROUP BY 
        SupplierName,
        YEARID,
        )DTL
   ORDER BY GrossMargin DESC

我期待桌子看起来像：

但我让供应商重复多行。enter image description here

Answer 1

我会试一试。

首先：你加入我的口味太多了。请记住，更少的连接通常意味着优化器的决策更少，因此代码更强大。此外，它通常首先表现更好。

如果您忽略了您希望零售以每年百分比表示的事实，那么解决起来非常简单：

Select 
SupplierName,
Sum(CASE WHEN YearID = 2018 THEN Supl_cst ELSE NULL END) SC_2018,
Sum(CASE WHEN YearID = 2017 THEN Supl_cst ELSE NULL END) SC_2017,
Sum(CASE WHEN YearID = 2016 THEN Supl_cst ELSE NULL END) SC_2016,

Sum(CASE WHEN YearID = 2018 THEN Retail_cst ELSE NULL END) Retail_2018,
Sum(CASE WHEN YearID = 2017 THEN Retail_cst ELSE NULL END) Retail_2017,
Sum(CASE WHEN YearID = 2016 THEN Retail_cst ELSE NULL END) Retail_2016
FROM MM_TRX_TABLE S
  WHERE YEARID IN (2018,2017,2016)
GROUP BY SupplierName

如果你想要百分比，只需将总数加回第一个结果并在总和中进行除法：

Select 
SupplierName,
Sum(CASE WHEN YearID = 2018 THEN Supl_cst ELSE NULL END) SC_2018,
Sum(CASE WHEN YearID = 2017 THEN Supl_cst ELSE NULL END) SC_2017,
Sum(CASE WHEN YearID = 2016 THEN Supl_cst ELSE NULL END) SC_2016,

Sum(CASE WHEN YearID = 2018 THEN Retail_cst / Retail_total ELSE NULL END) Retail_2018,
Sum(CASE WHEN YearID = 2017 THEN Retail_cst / Retail_total ELSE NULL END) Retail_2017,
Sum(CASE WHEN YearID = 2016 THEN Retail_cst / Retail_total ELSE NULL END) Retail_2016
FROM MM_TRX_TABLE S
Join (select 
        YearID, 
        sum(Retail_cst) Retail_total
      Group by YearID
     ) T
Using (YearID)
  WHERE S.YEARID IN (2018,2017,2016)
GROUP BY SupplierName