Group mysql query by 15 min intervals

Question

I\'ve got a monitoring system that is collecting data every n seconds (n is approximately 10 but varies). I\'d like to aggregate the collected data by 15 minute intervals.

Answer 1

I started with the answer given above by unutbu but didn't get what I needed and had to add a bit to it.

Select Created, from_unixtime(FLOOR(UNIX_TIMESTAMP(Created)/(15*60))*(15*60)) GroupTime, COUNT(*) as Cnt FROM issue i GROUP BY GroupTime

This code divides by the 900 seconds in a 15 minute span then floors the value and multiplies it back up by 900, essentially rounding down to the nearest 15 minute increment.