Truncated Time Values Using TIMEDIFF With ORDER BY Query
I'm using the following query:
SELECT glider, timestamp, TIMEDIFF(timestamp, UTC_TIMESTAMP()) AS last_contact
FROM surfacings
INNER JOIN
(SELECT MAX(timestamp) AS most_recent FROM surfacings GROUP BY glider)
AS tmp
WHERE surfacings.timestamp = tmp.most_recent;
to calculate the amount of time that has elapsed since the last inserted timestamp for each glider. Everything works fine: ....
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