I had one interview where they asked me to write out some fairly complex SQL joins on a white board. This was for a Java dev gig, NOT a SQL admin gig. I decided to really lean into how awful it was by putting in notations for three different implementations (Oracle, MSSQ, and Postgres). I was subtly making fun of them but they didn't pick up on it.

I got the offer and took it because I do contracting and had just unexpectedly gotten a contract canceled early, so I was unemployed and have a family. At the end of the 3 month contract they offered me a full time position and I declined.