Mysql datetime format add 10 minutes

Question

Hi i have table with datetime variable. I was wondering if i can somehow change the datetime column to add 1O minutes to stored date. Perhaps some trigger has to be involved.

Thanks for help

Answer 1

I like the INTERVAL expr unit notation. It feels more readable to me:

SELECT NOW(),
       NOW() + INTERVAL 10 MINUTE;


+--------------------------------+-------------------------------+
|             NOW()              |  NOW() + INTERVAL 10 MINUTE   |
+--------------------------------+-------------------------------+
| August, 12 2013 14:12:56+0000  | August, 12 2013 14:22:56+0000 |
+--------------------------------+-------------------------------+

If you want to select existing rows and add 10 minutes to the result:

SELECT the_date + INTERVAL 10 MINUTE FROM tbl;

If you want to alter existing rows stored in a table, you could use:

UPDATE tbl SET the_date = the_date + INTERVAL 10 MINUTE;

If you want increase by force a value by 10 minutes while inserting, you need a trigger:

CREATE TRIGGER ins_future_date BEFORE INSERT ON tbl
FOR EACH ROW
  SET NEW.the_date = NEW.the_date + INTERVAL 10 MINUTE