I've investigated this a little. Most DBA courses are for specific platforms. So you could take an Oracle course, a Microsoft course, or whatever. I'm considering doing one of the Oracle ones.

10gen, the company behind the MongoDB open-source “NoSQL” database, has teamed with EdX—the free online education collaboration between MIT, Harvard, and the University of California Berkeley—to bring ...

Work in cloud development and need to upgrade your skills for this year and beyond? Then the 2022 Amazon Web Services Database Bundle has you covered. And since it’s offered this week for just $29.99, ...