I have a good friend from a previous job who is an Oracle DBA, he is kind of shy and doesn't like a big presence on the net. I have blatantly stolen work from him in the past, including some excerpts from this particular document (always with his knowledge). But the poor bugger had the lack of foresight to send me this complete PDF document. So, I quickly decided I had better post it just to show him blogging isn't all evil and invitation to flaming.
That said, Jeremy's quick write up on oracle date columns that he did for his internal support staff. Absolutely nothing earth shattering or ground breaking, but I can't see any errors with it and it is good to give to people who can't speak "DBA". Yes, I have used this in the past elsewhere as well. But this is the complete PDF.