And datawarehousing is the act of storing immense amounts of data for later mining purposes. Usually, but not always, a data warehouse is a static database(s) where records are inserted/appended on a monthly, quarterly, or yearly basis, but rarely updated once they are put there.
There are plenty of examples where the existing records are updated, though, so it's not a hard set rule.
Catadmin - MCDBA, MCSA
"Just because I'm paranoid doesn't mean the universe *isn't* out to get me!"