Move apps from one Apple ID to another
Solution 1:
Sorry, the short answer is "No".
The longer answer is "No, you cannot do this, sorry".
And last, but not least, the official answer is sadly no.
Here's the relevant text from the FAQ linked above.
I have multiple Apple IDs. Is there a way for me to merge them into a single Apple ID?
Apple IDs cannot be merged. You should use your preferred Apple ID from now on, but you can still access your purchased items such as music, movies, or software using your other Apple IDs.