将列的每个唯一值分解为多列，然后显示在单行中

Question

在我的实际数据中，我有以下查询

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

我目前的结果是每个销售人员的名字被分成 3 行，每行只有一个非空值的 Goal_Volume ......我需要一行中的所有内容......可能需要多个子查询来加入每个产品? 见下图。

在此处输入图片说明

谢谢您的帮助

Answer 1

您可以使用条件聚合：

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]

与您的查询几乎相同，只是添加了MAX和GROUP BY 。