Rodrigo De León wrote:
On Jun 13, 11:17 am, [EMAIL PROTECTED] (Bob Singleton) wrote:
Any suggestions 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()}
SELECT
TYPE, ID, STATUS
, (COALESCE(
(SELECT MIN(DATETIME) FROM STATUSLOG
WHERE TYPE = S.TYPE AND ID = S.ID AND DATETIME > S.DATETIME)
, NOW()::TIMESTAMP
) - DATETIME) AS DURATION
FROM STATUSLOG S
ORDER BY TYPE, ID, STATUS
---------------------------(end of broadcast)---------------------------
TIP 6: explain analyze is your friend
Awesome - thank you very much! Slightly modified to collapse by TYPE /
ID / STATUS
SELECT
TYPE, ID, STATUS, SUM(
(COALESCE(
(SELECT MIN(DATETIME) FROM STATUSLOG
WHERE 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
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