Provided auto-commit set to false
Then the answer is straight-forward if you are concerning on querying in the middle of insert (as you have mentioned in comment on another answer):
Given that in same connection, you cannot do query before your previous insert statement finished, that means your query needs to be from another connection.
In Oracle, before any insert/update/delete is committed, the change is not visible to other connection. That means, the query will see the snapshot before any insert is done, until you commit the change.
Then you should have no concern about the insert order in such aspect.
Thanks, so if otherwise if the auto commit is set to true, will the insert order matter?