if($logNums >= 20) {

$logList = $tableLog->limit(20)->order("id", "asc")->select();

foreach($logList as $k => $v){

$condition[] = $v['id'];

}

$tableLog->where('id', 'in', $logList)->limit(20)->order("id", "asc")->delete();

}

请教大佬关于thinkphp操作数据库的问题，如何保留最新的20条，大于20条就清除多余的呢？

先感谢解答..