我如何从数据库中删除数据，但最近24小时UNIX时间格式除外

Question

I want to delete data from database via corn.

For example: i need to delete my all data except last 24 hour.

My time format is UNIX time Like

1531920800

Answer 1

This should do the trick:

$time = time();
$oneDay = 60 * 60 * 24;
$yesterday = $time - $oneDay;

$sql = 'DELETE FROM tablename WHERE columname < ' . $yesterday;

Answer 2

You may use UNIX_TIMESTAMP() to access the current time since the UNIX epoch, then adjust it backwards by 24 hours. Something like this:

DELETE FROM yourTable
WHERE ts_column < UNIX_TIMESTAMP() - (24*60*60);