On Mon, 10 Feb 2003 john(at)flowlabs(dot)com wrote:
> I am having problems adding an interval to a date in a select statement
> where the interval is specified as a selected column. Is this possible?
> Below is an example of the query that I'm executing. The query gives and
> error at the num_min column in the outer query. It works fine if that is
> replaced with the text '90 minutes'. Thank you in advance for all help
> provided.
interval <stuff> is the form for an interval literal. If the column is
already an interval, you probably don't need it at all. If you need to
cast it you should do a cast CAST (num_min AS INTERVAL)