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从文件大小和全部下载计数获取全部下载带宽服务
原标题:Getting total download bandwidth served from file size and total download count

我有一个有这些属性的 files 表格:

f_id, s_id, u_id, name, size, downloads, uploaded

我希望我的用户账户页面能显示用户上传的全部带宽。 要做到这一点, 我需要以每个用户上传的大小来计算, 然后通过下载来计算, 然后将所有结果加起来 。

最初,我让用户 全部文件化,然后 * 通过他们的全部下载, 但显然不准确。这里的一个例子,我的查询:

$sql =  SELECT SUM(downloads)
        AS downloads
        FROM `files`
        WHERE u_id = (SELECT u_id FROM `users` WHERE username = ? LIMIT 1)
        LIMIT 1 ;

我该怎么做?

最佳回答
SELECT SUM(size*downloads) AS bandwidth
FROM files f
   JOIN users u
      ON f.u_id = u.u_id
WHERE u.username = ?
GROUP BY u.u_id

这将为您提供一个数字, 代表用户上传生成的带宽

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