Mysql 带有DESC的SQL查询无法正常工作

我不明白为什么按平均顺序排序不能正确工作，因为我需要最高的平均值，而且投票是从上到下的，但DESC不能解决什么问题。我在var_dump最高中心的结果在底部，但我需要从顶部开始，然后进入底部

SELECT c.*, r.votes, c.total_comments,
       ROUND(sumrate / votes) AS average
FROM catalog c LEFT JOIN
     (SELECT r.object_id, COUNT(*) as votes, SUM(r.rate) as sumrate
      FROM ratings r
      GROUP BY r.object_id
     ) r
     ON r.object_id = c.catalog_id LEFT JOIN
     (SELECT c.catalog_id, COUNT(*) as total_comments
      FROM comments c
      GROUP BY c.catalog_id
     ) c
     ON c.catalog_id = c.catalog_id
GROUP BY c.catalog_id
ORDER BY average, votes DESC;

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因为您可以定义每一列的顺序，而不仅仅是总的顺序。默认值为ASC

您点的菜

ORDER BY average, votes DESC

自动变成

ORDER BY average ASC, votes DESC

但是你在找

ORDER BY average DESC, votes DESC

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您需要为这两列指定DESC。否则默认为ASC

SELECT c.*, r.votes, c.total_comments,
       ROUND(sumrate / votes) AS average
FROM catalog c LEFT JOIN
     (SELECT r.object_id, COUNT(*) as votes, SUM(r.rate) as sumrate
      FROM ratings r
      GROUP BY r.object_id
     ) r
     ON r.object_id = c.catalog_id LEFT JOIN
     (SELECT c.catalog_id, COUNT(*) as total_comments
      FROM comments c
      GROUP BY c.catalog_id
     ) c
     ON c.catalog_id = c.catalog_id
GROUP BY c.catalog_id
ORDER BY average DESC, votes DESC;

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请注意，GROUPBY是无效的，在较新的MySQL版本中是不允许的。如果指定了GROUP BY子句，则SELECT列表中的每个列引用必须标识一个分组列，或者是集合函数的参数。这是什么意思？这是分组中的短表别名吗？你能举个例子吗？