why mysql not entry sql in laravel code example

Example 1: get single column value in laravel eloquent

Vehicle::find(3)->value('register_number');

Example 2: TRANSACTON LARAVEL QUERY BUILDER

DB::beginTransaction();

try {
    DB::insert(...);    
    DB::commit();
} catch (\Throwable $e) {
    DB::rollback();
    throw $e;
}