Question

When I subtract timestamps, the interval is in form DD:HH:MM:SS. How can I convert it all to minutes without extracting days and hours and multiplication/addition? I’m looking for a single function which I can substitute for date_part in this query so that it returns 65:

select date_part('minutes', '65 minutes'::interval);

Context: I need to know how many minutes have passed since given timestamp.

Answer 1

SELECT EXTRACT(EPOCH FROM '2 months 3 days 12 hours 65 minutes'::INTERVAL)/60;

seems to work.

WARNING: “seems” is the key word.