mysql calculate seconds between two date/times for each day [duplicate]

Question

I have this table but I am helpless how to calculate seconds for each separate day from this table:

id  from            to --------------------------------------------------- 1   2013-01-31 23:50:00 2013-02-02 09:00:00 2   2013-02-05 11:21:12 2013-02-08 01:01:01 3   2013-02-08 17:33:44 2013-02-08 18:22:55 4   2013-02-12 01:40:12 2013-02-12 02:00:59 5   2013-02-28 01:40:12 2013-03-02 02:00:59 

Now I need to gain number of seconds for each day in february between from and to. so for 1st Feb - x seconds, 2nd Feb - y seconds, 3rd Feb - 0 seconds, etc. Any idea how should I do it? Many thanks.

Answer 1

Use TIMESTAMPDIFF in MySQL:

SELECT TIMESTAMPDIFF(SECOND,from,to);  

Example:

SELECT TIMESTAMPDIFF(SECOND,'2016-01-01 00:00:00','2016-01-11 00:00:00'); -- 864000 SELECT TIMESTAMPDIFF(MINUTE,'2016-01-01 00:00:00','2016-01-11 00:00:00'); -- 14400 SELECT TIMESTAMPDIFF(HOUR,'2016-01-01 00:00:00','2016-01-11 00:00:00'); -- 240 SELECT TIMESTAMPDIFF(DAY,'2016-01-01 00:00:00','2016-01-11 00:00:00'); -- 10