Mysql SQL：如何在列中透视维度？

我希望做到以下几点：

原始表格：这只有两篇文章，它们的流量通道和独特的页面浏览量

SELECT * FROM website_content_table

返回：

我想返回一个如下所示的表：

这是我目前的解决方案——我认为这是不雅观和缓慢的。在BigQuerySQL中肯定有一种更简单的方法可以做到这一点（注意，我没有可以使用的pivot函数）

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使用带条件聚合的透视查询有一种更简单的方法：

SELECT
    pageTitle,
    SUM(unique_pageviews) AS unique_pageviews,
    SUM(CASE WHEN traffic_channel = 'Organic' THEN unique_pageviews ELSE 0 END) AS Organic,
    SUM(CASE WHEN traffic_channel = 'Email'   THEN unique_pageviews ELSE 0 END) AS Email,
    SUM(CASE WHEN traffic_channel = 'Paid'    THEN unique_pageviews ELSE 0 END) AS Paid
FROM yourTable
GROUP BY
    pageTitle;

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使用带条件聚合的透视查询有一种更简单的方法：

SELECT
    pageTitle,
    SUM(unique_pageviews) AS unique_pageviews,
    SUM(CASE WHEN traffic_channel = 'Organic' THEN unique_pageviews ELSE 0 END) AS Organic,
    SUM(CASE WHEN traffic_channel = 'Email'   THEN unique_pageviews ELSE 0 END) AS Email,
    SUM(CASE WHEN traffic_channel = 'Paid'    THEN unique_pageviews ELSE 0 END) AS Paid
FROM yourTable
GROUP BY
    pageTitle;

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如果列值是固定的，则可以使用条件聚合-

SELECT pageTitle
      ,SUM(unique_pageviews) unique_pageviews
      ,MAX(CASE WHEN traffic_channel = 'Organic' THEN unique_pageviews END) AS Organic
      ,MAX(CASE WHEN traffic_channel = 'Email' THEN unique_pageviews END) AS Email
      ,MAX(CASE WHEN traffic_channel = 'Paid' THEN unique_pageviews END) AS Paid
FROM website_content_table
GROUP BY pageTitle;

---

如果列值是固定的，则可以使用条件聚合-

SELECT pageTitle
      ,SUM(unique_pageviews) unique_pageviews
      ,MAX(CASE WHEN traffic_channel = 'Organic' THEN unique_pageviews END) AS Organic
      ,MAX(CASE WHEN traffic_channel = 'Email' THEN unique_pageviews END) AS Email
      ,MAX(CASE WHEN traffic_channel = 'Paid' THEN unique_pageviews END) AS Paid
FROM website_content_table
GROUP BY pageTitle;

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太神了太容易了！太神了太容易了！