我希望$minutes
在查询中以最短的datecommented
(以分钟表示)。当我回显$minutes
时,我得到一个空白结果。我究竟做错了什么?从查询中发现日期
$queryuidcount = "SELECT loginid, datecommented
FROM comment
WHERE (HOUR(NOW()) - HOUR(datecommented)) <= 1
AND loginid = '$uid'
ORDER BY datecommented ASC
LIMIT 1'";
$row2 = mysql_fetch_array($queryuidcount);
$minutes = $row2["datecommented"];