Re: calculate time diffs across rows with single timestamp

Rodrigo De León wrote: <blockquote cite="mid1181753515.419178.63440@j4g2000prf.googlegroups.com" type="cite"><pre
wrap="">OnJun 13, 11:17 am, <a class="moz-txt-link-abbreviated"
href="mailto:bsingle...@ibss.net">bsingle...@ibss.net</a>(Bob Singleton) wrote: </pre><blockquote type="cite"><pre
wrap="">Anysuggestions on how I can build a result set that would return
 

ASSET 001 AAA 1:00 (1 hour)
ASSET 001 BBB 0:10 (10 minutes)
ASSET 001 CCC 0:08 (8 minutes)
ASSET 001 DDD {difference between timestamp and now()}
ASSET 002 AAA 0:03 (3 minutes)
ASSET 002 BBB {difference detween timestamp and now()}
ASSET 003 AAA{diff between timestamp and now()}   </pre></blockquote><pre wrap="">
SELECT
TYPE, ID, STATUS
, (COALESCE((SELECT MIN(DATETIME) FROM STATUSLOGWHERE TYPE = S.TYPE AND ID = S.ID AND DATETIME > S.DATETIME),
NOW()::TIMESTAMP)- DATETIME) AS DURATION
 
FROM STATUSLOG S
ORDER BY TYPE, ID, STATUS


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TIP 6: explain analyze is your friend
 </pre></blockquote> Awesome - thank you very much! Slightly modified to collapse by TYPE / ID / STATUS<br /><br /><pre
wrap="">SELECT
TYPE, ID, STATUS, SUM(   (COALESCE((SELECT MIN(DATETIME) FROM STATUSLOGWHERE TYPE = S.TYPE AND ID = S.ID AND DATETIME
>S.DATETIME), NOW()::TIMESTAMP) - DATETIME))
 
FROM STATUSLOG S
ORDER BY TYPE, ID, STATUS

Thanks for the lesson!

Bob Singleton
</pre>