将一列的每个唯一值分成多列，然后在单行中显示

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

我当前的结果是每个销售人员的名字分成3行，分为3行，每行的Goal_Volume值只有一个非NULL值...我需要一行中的所有内容...可能需要多个子查询才能加入每个产品？ 参见下图。

enter image description here

感谢您的帮助

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。