在Laravel中雄辩地应用Left Join

Question

requestPermission

Answer 1

希望这对您有帮助

$user = DB::table('users')
                ->leftJoin('union_user', 'users.id', '=', 'union_user.user_id')
                ->orderBy(union_user.user_id)
                ->max('union_user.user_id');