This is an opportunity to exercise some social nuance. To them, "MySQL" and "database" are equivalent, and to point out the difference is to make the social fau

This is an opportunity to exercise some social nuance. To them, "MySQL" and "database" are equivalent, and to point out the difference is to make the social faux-pas of overspecification (somewhat of a trope for nerds like us). By the time you're having this conversation with a BA, the DB is not going to be changed because they made some offhand reference to a different DB. They said something technically wrong, but in a way that doesn't have any meaningful effect on what they were trying to say: as such, to nitpick a detail like that may give the impression of trying to reinforce your superiority by pointing out tiny technical mistakes in their speech. So just let it go :)