After installing cleandata, default ordering for children of node 2 will be by "Priority"

So, create one article named "art1" and another one called "art2" below node 2. Both will then have a priority of "0" by default

Then list the children of node 2 in admin interface:
Using mysql, the articles will be listed in the order they were created.
Using ezoracle, the articles will be listed in the opposite order.

I am not sure if it is defined anywhere what should happen with objects which have the same priority value. But the fact that oracle vs mysql behaves different is a bit confusing