left and right join in laravel code example

Example 1: laravel outer join

->join('answers as answers', 'responses.answer_id', '=', 'answers.id', 'left outer')

Example 2: laravel find query

$model = App\Models\Flight::where('legs', '>', 100)
            ->firstOr(['id', 'legs'], function () {
                // ...
            });