mysql - 为什么我的 MySQL 查询排序不正确？

Question

在下面的查询中，我尝试按 fc.order 按升序对结果进行排序:

SELECT *, count(*) AS threads_count FROM (
    SELECT fc.uuid AS category_uuid, fc.name, fc.description, fc.order, fc.icon,
           u.uuid AS user_uuid, u.username, u.avatar
    FROM forum_categories AS fc
    INNER JOIN forum_threads AS ft ON fc.id = ft.forum_category_id
    INNER JOIN users as u ON ft.created_by = u.id
    ORDER BY fc.order ASC, ft.created_at DESC
) AS tmp_table GROUP BY category_uuid

但是它似乎不起作用。以下是上述查询结果的屏幕截图:

如何获取按 order 列排序的结果？

Answer 1

好的，谢谢大家，但我明白了:

SELECT * FROM (
    SELECT *, count(*) AS threads_count FROM (
        SELECT fc.uuid AS category_uuid, fc.name, fc.description, fc.order, fc.icon,
               u.uuid AS user_uuid, u.username, u.avatar
        FROM forum_categories AS fc
        INNER JOIN forum_threads AS ft ON fc.id = ft.forum_category_id
        INNER JOIN users as u ON ft.created_by = u.id
        ORDER BY ft.created_at DESC
    ) AS t1 GROUP BY category_uuid
) as t2 ORDER BY `order`