sql - PIVOT SQL - 指导

Question

我有以下代码:

    SELECT * 
    FROM
        (   
        SELECT p.ProductID, pc.Name, ISNULL(p.Color, 'Uncolored') AS Color
        FROM SalesLT.ProductCategory AS pc
        INNER JOIN SalesLT.Product AS p ON pc.ProductCategoryID = p.ProductCategoryID
        )
    AS PPC
    PIVOT (COUNT(ProductID) FOR COLOR IN ([Red], [Blue], [Black], [Silver], [Yellow], [Grey], [Multi], [Uncolored]))
    AS ColorPivotTable

这给出了以下输出:

我想知道对此应用总计列的最佳方法

期望的输出

非常感谢您的任何反馈。

Answer 1

这是 CUBE() (or GROUPING SETS) calculation 的一个很好的例子, 结合 PIVOT representation , I had to write a blog post about it .

下面是可以生成您正在寻找的内容的解决方案:

WITH Bikes(Name, Colour) AS (
  SELECT * FROM (
    VALUES ('Mountain Bikes', 'Black'), 
           ('Mountain Bikes', 'Black'),
           ('Mountain Bikes', 'Silver'),
           ('Road Bikes', 'Red'),
           ('Road Bikes', 'Red'),
           ('Road Bikes', 'Red'),
           ('Road Bikes', 'Black'),
           ('Road Bikes', 'Yellow') 
  ) AS Bikes(Name, Colour)
)
SELECT
  Name, 
  COALESCE(Red, 0) AS Red, 
  COALESCE(Blue, 0) AS Blue, 
  COALESCE(Black, 0) AS Black, 
  COALESCE(Silver, 0) AS Silver, 
  COALESCE(Yellow, 0) AS Yellow, 
  COALESCE(Grey, 0) AS Grey, 
  COALESCE(Multi, 0) AS Multi, 
  COALESCE(Uncoloured, 0) AS Uncoloured, 
  Total
FROM (
  SELECT 
    Coalesce(Name, 'Total') Name, 
    COALESCE(Colour, 'Total') Colour, 
    COUNT(*) Count
  FROM Bikes
  GROUP BY CUBE (Name, Colour)
) AS t
PIVOT (
  MAX(Count) FOR Colour IN (
    Red, Blue, Black, Silver, Yellow, Grey, Multi, Uncoloured, Total
  )
) AS p
ORDER BY CASE Name WHEN 'Total' THEN 1 ELSE 0 END, Name

SQLFiddle here