This exam question is making my head spin. I think I'll just go with the flow and say that all the options are true. That way, I'm guaranteed to get at least a few answers right!
I'm going to have to agree with Doug on C. Interval day to second columns are the way to go if you need that extra precision. Who needs years and months anyway? Just give me seconds!
D and E both sound plausible to me. Interval year to month columns only support monthly intervals, and those intervals are limited to a single year or a range of years.
Hmm, I'm not sure about B. Can you really copy the value from an interval day to second column into an interval year to month column? Seems like that might cause some data loss.
Paul
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