SATA drives use the modern SATA interface between the drive and mother board, using the narrow SATA data cables. PATA drives are older technology that uses the wide ribbon cables with a different connector. The two interfaces are not compatible without an adapter that connects to the drive.
SATA drives are much faster than PATA drives, and PATA drives are just about obsolete. Very few current mother boards have PATA connectors. There are three different P5GDC boards, but all of them have one PATA port connector.
I would not buy a PATA drive unless I had to use a board that cold only use PATA drives. PATA drives are a step backwards in disk I/O technology, and I see no point in buying one if you have a choice.