mysql问题left join and from_unixtime

Question

我有这个

SELECT COUNT(1) cnt, a.auther_id
    FROM `posts` a 
    LEFT JOIN users u ON a.auther_id = u.id
    GROUP BY a.auther_id
    ORDER BY cnt DESC
    LIMIT 20

它工作正常，但现在我想要从最后一天内选择帖子。我试着用

    WHERE from_unixtime(post_time) >= SUBDATE(NOW(),1) 

但是没有用。有人知道为什么吗？

Answer 1

这可能有效:

WHERE FROM_UNIXTIME(post_time) >= SUBDATE(NOW(), INTERVAL 1 DAY)