Answers for "laravel model join where"

join in laravel eloquent

$customer = DB::table('customers')
                ->join('shops', 'customers.shop_id', '=', 'shops.shop_id')
                ->where('customer_contact', $contact_no)
                ->get();

laravel outer join

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