constraint without selection laravel code example

Example 1: join in laravel eloquent

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

Example 2: Laravel DB facade relations

$antiques = DB::table('antiques')
    ->join('images', 'images.antiques_id', '=', 'antiques.id')
    ->latest()
    ->limit(20)
    ->get(['antiques.*', 'images.path']);