laravel wherenotnull code example

Example 1: larave whereNotNull

# whereNull
$users = DB::table('users')
  ->whereNull('updated_at')
  ->get();
# whereNotNull
$users = DB::table('users')
  ->whereNotNull('updated_at')
  ->get();

Example 2: laravel not in query

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