mysql - 表中的行顺序取决于相关表

Question

我有两张 table 。一个带有视频的 (lol_videos):

ID、标题、网址...

和点击表(lol_hits):

ID、视频ID、时间戳

我想根据视频在特定时间范围内的点击次数(存储在 lol_hits 中)对视频表中的视频进行排序。

我尝试了一些不同的东西，但我真的做不到。到目前为止，我只是得到一些无用的 mysql 错误:(

$query = "SELECT `lol_videos`.*, COUNT(lol_hits.videoID) as hit_count".
" FROM `lol_videos`".
" WHERE published > $now AND pushed > 0".
" LEFT JOIN `lol_hits`".
" ON (`lol_hits`.videoID = `lol_videos`.ID)".
" ORDER BY hit_count DESC";
$result = mysql_query($query) or die(mysql_error());

有人对如何解决这个问题有建议吗？

Answer 1

这应该有效:

SELECT v.*, v2.numHits FROM (
    SELECT videoID, COUNT(ID) 'numHits' FROM lol_hits GROUP BY videoID
) AS v2 
JOIN lol_videos v ON (v.ID = v2.videoID)
ORDER BY v2.numHits DESC;