Netezzaの行から重複を示す列

Question

行を列に転置しようとしています。 サプライヤーごとに1行が表示されます。

これは、与えられたテーブルです：

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 

私が見えるようにテーブルを期待している：

しかし、私は複数の行で繰り返さサプライヤーを取得します。 enter image description here

Answer 1

私はそれを撃つでしょう。

まず第一に、あなたは私の味のためにあまりにも多くの方法で参加しています。結合が少なくなると、オプティマイザによる決定が少なくなるため、より堅牢なコードになります。さらに、一般的には最初の方がパフォーマンスが優れています。

あなたはそれを解決するために非常に簡単です小売りは年間割合として表現されることを望んでいるという事実は無視した場合：あなたは割合にしたい場合は、単に最初の結果に戻し合計に参加

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 

を合計内の除算を実行します。

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