About a decade ago I worked for an insurance company. It was an offshoot that was spun out of of another insurance company from another state, which itself was decades old. As best as I could infer from my vantage point, my expertise at the time, and the spare time I was willing to investigate the matter, the database schema and a good chunk of the core data tables were first created in the late-80s on a mainframe and had outlived 4 or 5 application rewrites and (at least) two SQL variant migrations. I'm hand-waving exact details because nobody from the original company or that time period was still around even prior to the corporate split and so there was nobody who could answer history questions in detail, but that's also a testament to how persistent data can be. There was one developer from the parent company they slapped with golden handcuffs who knew where most of the bodies were hid in that software stack that enabled decent productivity but even she was lacking a solid 15 years of first-hand experience of its inception. To the best of my knowledge that database is still in use today.

Databases in heavy use will not just outlast your application, they have a strong chance of outlasting your career and they very well may outlast you as a person.