> Yes. A transaction, regardless of mode, has a beginning and an end. It begins with TRANSACTION START and ends with either COMMIT
> or ROLLBACK. Period. Adam already mentioned that COMMIT uses less resources than ROLLBACK - so commit read-only transactions if
> you want to conserve a bit of resource.

Because read-only transaction can't modify data, it will be internally always committed,
regardless whether you use COMMIT or ROLLBACK (i.e. you will see no difference
between the two)

Ivan