mysql 按照两个字段之和进行排序

SELECT *,zan_num+fake_zan_num show_zan FROM `tf_news` order by show_zan desc

TP实现

$news = M('news');

$result_list = $news->where($where)->limit($start . ',' . $step)->field('*,zan_num+fake_zan_num show_num')->order($order)->select();