laravel whereraw

1use Illuminate\Support\Facades\DB;
2
3$users = DB::table('users')
4            ->join('contacts', 'users.id', '=', 'contacts.user_id')
5            ->join('orders', 'users.id', '=', 'orders.user_id')
6            ->select('users.*', 'contacts.phone', 'orders.price')
7            ->get();

1DB::table(..)->select(..)->whereNotIn('book_price', [100,200])->get();

1$users = DB::table('users')
2                ->where('name', 'like', 'T%')
3                ->get();

1$users = DB::table('users')
2                    ->whereIn('id', [1, 2, 3])
3                    ->get();

1use Illuminate\Support\Facades\DB;
2
3$first = DB::table('users')
4            ->whereNull('first_name');
5
6$users = DB::table('users')
7            ->whereNull('last_name')
8            ->union($first)
9            ->get();