I'm the director of technology for a neurology lab, where we collect patient health record data in a variety of disparate machines and modalities (e.g., MRI, EEG, physical functioning, retinal scans, etc.). We've been using the open-source database software REDCap (basically a wrapper for MySQL that enables easy GUI-based data entry), but we are reaching the limits of what it can handle and need something that can scale with our growing database.

I have little experience in database management myself, but I am a competent programmer and feel comfortable learning whatever is needed (famous last words, I know).