將列的每個唯一值分解為多列，然后顯示在單行中

Question

在我的實際數據中，我有以下查詢

SELECT Sales Person,
        (CASE WHEN [ProductType] = 'car' THEN [GOAL_VOLUME]
          END) AS 'car Goal'
    , (CASE WHEN [ProductType] = 'boat' THEN [GOAL_VOLUME]
          END) AS 'boat Goal'
    , (CASE WHEN [ProductType] IN ('bike', 'scooter') THEN [GOAL_VOLUME]
          END) AS 'bike/scooter Goal'
FROM PRODUCT_GOALS

我目前的結果是每個銷售人員的名字被分成 3 行，每行只有一個非空值的 Goal_Volume ......我需要一行中的所有內容......可能需要多個子查詢來加入每個產品? 見下圖。

在此處輸入圖片說明

謝謝您的幫助

Answer 1

您可以使用條件聚合：

SELECT [Sales Person]
    , MAX(CASE WHEN [ProductType] = 'car' THEN [GOAL_VOLUME]
          END) AS 'car Goal'
    , MAX(CASE WHEN [ProductType] = 'boat' THEN [GOAL_VOLUME]
          END) AS 'boat Goal'
    , MAX(CASE WHEN [ProductType] IN ('bike', 'scooter') THEN [GOAL_VOLUME]
          END) AS 'bike/scooter Goal'
FROM PRODUCT_GOALS
GROUP BY [Sales Person]

與您的查詢幾乎相同，只是添加了MAX和GROUP BY 。