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 was not satisfied by GROUP BY.

SELECT   datetime
FROM     table
WHERE MOD(MINUTE(TIME(datetime)),15) = 0 AND SECOND(TIME(datetime)) = 0;

Answer 2

THis Work for me

SELECT CONCAT (
        YEAR(transactionDate)
        ,'-'
        ,MONTH(transactionDate)
        ,'-'
        ,DAYOFMONTH(transactionDate)
        ,' '
        ,HOUR(transactionDate)
        ,':'
        ,((floor((MINUTE(transactionDate) / 15)) + 1) * 15) - 1
        ,':59'
        ) AS tmp1
    ,count(*)
FROM tablename
GROUP BY tmp1 limit 20;

Answer 3

Change "15" to whatever interval you want.

select count(*),
CONCAT(HOUR(col_date),":",(MINUTE(create_date) div 15)*15) as date
from tablename
GROUP BY date
ORDER BY col_date ASC;

Answer 4

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.