Sounds like Wylie needs to go on an RDBMS course...
... because he doesn't know the difference between a database and the application using it. RDBMS (e.g. Oracle, MySQL, PostgreSQL) may be used for as a storage system for machine learning or statistical analysis but PCA and dimensionality reduction are nothing to do the RDBMS. They are very much to do with the applications running on top of it.
Wylie may think that he's sounding clever, but really he's sounding like a bit of a smart ass. Maybe he knows the difference... and maybe he doesn't either...