Where clause in laravel code example

Example 1: laravel not in query

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

Example 2: wherein laravel

DB::table('user')->whereIn('id', [100,200])->get();

Example 3: laravel wher in

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

Example 4: laravel db::query update

DB::table('user')->where('email', $userEmail)->update(array('member_type' => $plan));

Example 5: laravel with and where

$projects = Project::whereHas('projectOffers', function ($offer) {
            $offer->where('teacher_id', "Ahmed");
            $offer->where('status_id', "Accepted");
        })->where('status_id', "inprogress")->get();

Example 6: laravel where

$users = DB::table('users')
                ->whereMonth('created_at', '12')
                ->get();