First of all, just wanted to say I'm not in university yet, but as a senior I still believe I could offer some insight. I think what's important is what you plan on going into, as data management, to me anyway, seems like a course you'd take if you planned on going into a business-related career / university program. I'd say Advanced Functions is a more well-rounded course, can apply to most, if not all pre-reqs for any university program that requires math.
However, though you say you do not need math, usually it's at least a recommendation, meaning it would be useful for you. USeful in a couple ways: it helps prepare you for the material, and also having a course instead of a spare does make more work, but can help prepare you for the workload at university.
Sorry that I'm not in university yet, but hope this helps!