mysql - Calculating time difference between 2 dates in minutes

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

I think you could use TIMESTAMPDIFF(unit,datetime_expr1,datetime_expr2) something like

select * from MyTab T where
TIMESTAMPDIFF(MINUTE,T.runTime,NOW()) > 20