查询中两个时间戳之间的比较

Question

I want to run a cronjob which check in db table where timespamp is less than current time + 1 month. But not sure how can i do that.

I have tried something but that not works.

$buy_time=strtotime($row['sdate']);
$current_time= strtotime("now");
$diff=$current_time - $buy_time; 

$SQL = "UPDATE product SET status=0 WHERE sdate <'$diff'";
$res= mysqli_query($link,$SQL);

Answer 1

假设您正在为该sdate字段使用本地mysql date / datetime字段，则不要使用PHP生成日期并将其粘贴到查询中，直接在MySQL中完成所有操作：

... WHERE sdate >= (NOW() - INTERVAL 1 MONTH)

Answer 2

$currentTime = time();
$timePlusMonth = $currentTime+30*24*60*60; //30 days * 24 hours * 60 minutes * 60 seconds
$timePlusMonth = date("Y-m-d H:i:s", $timePlusMonth);

$query = "UPDATE product SET status=0 WHERE sdate < '$timePlusMonth'";
mysqli_query($link, $query);

your 'sdate' column must be in Ymd H:i:s format (2013-08-02 16:02:45)