Calculating time difference between 2 dates in minutes - mysql

Question

I have a field of time Timestamp in my MySQL database which is mapped to a DATE datatype in my bean. Now I want a query by which I can fetch all records in the database for which the difference between the current timestamp and the one stored in the database is > 20 minutes.
How can I do it?
What i want is:
SELECT * FROM MyTab T WHERE T.runTime - now > 20 minutes
Are there any MySQL functions for this, or any way to do this in SQL?

Answer 1

If you have MySql version above 5.6 you could use TIMESTAMPDIFF(unit,datetime_expr1,datetime_expr2) something like
select * from MyTab T where
TIMESTAMPDIFF(MINUTE,T.runTime,NOW()) > 20

Answer 2

MySql version >=5.6
I am using below code for today and database date.
TIMESTAMPDIFF(MINUTE,T.runTime,NOW()) > 20
According to the documentation, the first argument can be any of the following:
MICROSECOND
SECOND
MINUTE
HOUR
DAY
WEEK
MONTH
QUARTER
YEAR

Answer 3

ROUND(time_to_sec((TIMEDIFF(NOW(), "2015-06-10 20:15:00"))) / 60);

Answer 4

Try this one:
select * from MyTab T where date_add(T.runTime, INTERVAL 20 MINUTE) < NOW()
NOTE: this should work if you're using MySQL DateTime format. If you're using Unix Timestamp (integer), then it would be even easier:
select * from MyTab T where UNIX_TIMESTAMP() - T.runTime > 20*60
UNIX_TIMESTAMP() function returns you current unix timestamp.

Answer 5

You can try this:
SELECT * FROM MyTab T WHERE CURRENT_TIMESTAMP() > T.runTime + INTERVAL 20 MINUTE;
The CURRENT_TIMESTAMP() is a function and returns the current date and time. This function works From MySQL 4.0

Answer 6

If you have MySql version prior than 5.6 you don't have TIMESTAMPDIFF. So,I wrote my own MySql function to do this. Accets %i or %m for minutes and %h for hours. You can extend it.
Example of usage:
SELECT MYTSDIFF('2001-01-01 10:44:32', '2001-01-01 09:50:00', '%h')
Here goes the function. Enjoy:
DROP FUNCTION IF EXISTS MYTSDIFF;
DELIMITER $$
CREATE FUNCTION `MYTSDIFF`( date1 timestamp, date2 timestamp, fmt varchar(20))
returns varchar(20) DETERMINISTIC
BEGIN
declare secs smallint(2);
declare mins smallint(2);
declare hours int;
declare total real default 0;
declare str_total varchar(20);
if date1 > DATE_ADD( date2, interval 30 day) then
return '999999.999'; /* OUT OF RANGE TIMEDIFF */
end if;
select cast( time_format( timediff(date1, date2), '%s') as signed) into secs;
select cast( time_format( timediff(date1, date2), '%i') as signed) into mins;
select cast( time_format( timediff(date1, date2), '%H') as signed) into hours;
set total = hours * 3600 + mins * 60 + secs;
set fmt = LOWER( fmt);
if fmt = '%m' or fmt = '%i' then
set total = total / 60;
elseif fmt = '%h' then
set total = total / 3600;
else
/* Do nothing, %s is the default: */
set total = total + 0;
end if;
select cast( total as char(20)) into str_total;
return str_total;
END$$
DELIMITER ;