I built a system for MySQL a while ago so database patches (data fix, schema change, etc) are applied with code deploys. All database patches are written to be

I built a system for MySQL a while ago so database patches (data fix, schema change, etc) are applied with code deploys. All database patches are written to be repeatable, which means they contain logic that checks if they've been run already. They also have release and sequence ID so they're tracked and may be run out of sequence if needed. Once everyone got accustomed to the system, it's worked well for several years now.