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I need to read a timestamp from the database and turn that
into an integer describing how many months ago the event happened, rounding
downward. The events are guaranteed to be in the past. To start with, I tried subtracting a sample timestamp as
would be found in the DB from my benchmark date: uatrackingdb=>
select timestamp '2010-06-26 00:00:00' - timestamp '2008-11-07 00:00:00'; ?column? ---------- 596 days (1 row) I get a result in just days; no years or months cited.
I don’t understand that. When I try to extract the months “part” of this
value, I get: uatrackingdb=>
select extract ('months' from (select timestamp '2010-06-26 00:00:00' -
timestamp '2008-11-07 00:00:00')); date_part -----------
0 (1 row) It doesn’t matter if I use explicitly cited timestamps
as I’ve shown here or select a value from a timestamp field in the DB,
the results are the same. Using DATEs instead of TIMESTAMPs just makes things worse, I
can’t even get my expressions to parse correctly. Attempting to
coerce the 595 days into an INTERVAL gets me nowhere. Can anyone please advise me on how to proceed? Topher Eliot christopher.eliot@xxxxxxxxxxxxx +01 303 706-5766 [] |
