Challenge 1 / 1

Check out these two Doctrine queries that live inside CategoryRepository:

$this->createQueryBuilder('category')
$this->createQueryBuilder('category')->select('category')

What is the difference between them?

The second will only select the id of every category

Both queries will return the same thing: Category objects.

The second will error because you've already used the category alias.

The first one will error because we're not selecting anything!