DateTime::add adds hours even when interval should only be seconds

Question

This comes from my previous question on getting the average time interval over a specified data set, [located here][1]. I\'ll post the entire function again:

fun         


        

Answer 1

Hm, average difference in seconds, why that PHP swath of code if your database can give it to you:

SELECT 
  SEC_TO_TIME(MAX(TIME_TO_SEC(TIMEDIFF(end_time,start_time)))) AS max_timediff,
  SEC_TO_TIME(MIN(TIME_TO_SEC(TIMEDIFF(end_time,start_time)))) AS min_timediff,
  SEC_TO_TIME(AVG(TIME_TO_SEC(TIMEDIFF(end_time,start_time)))) AS avg_timediff,
  SEC_TO_TIME(SUM(TIME_TO_SEC(TIMEDIFF(end_time,start_time)))) AS sum_timediff,
  COUNT(id) as total_events
FROM atb_log 
WHERE 
  siteID=:siteID 
  AND start_time > :fromDate
  AND end_time < :toDate

Format those min/max/avg/sum of seconds as you like.