Database design question

[pokercurious]

There was a post quite some time ago asking how best to represent a hand history in a relational DB.

I'm trying to learn (read: hacking around with) some database design stuff so I can create a webapp tailored to some specific things I want to see.

The big question I'm curious about is whether information like cbet%, PFraise%, etc. should be pre-calculated and stored in the database or whether that's the sort of thing that should be done on the fly.