How to subtract 30 days from the current datetime in mysql?

Question

How do I subtract 30 days from the current datetime in mysql?

SELECT * FROM table
WHERE exec_datetime BETWEEN DATEDIFF(NOW() - 30 days) AND NOW();


        

Answer 1

MySQL subtract days from now:

select now(), now() - interval 1 day

Prints:

2014-10-08 09:00:56     2014-10-07 09:00:56

Other Interval Temporal Expression Unit arguments:

https://dev.mysql.com/doc/refman/5.5/en/expressions.html#temporal-intervals

select now() - interval 1 microsecond 
select now() - interval 1 second 
select now() - interval 1 minute 
select now() - interval 1 hour 
select now() - interval 1 day 
select now() - interval 1 week 
select now() - interval 1 month 
select now() - interval 1 year 

Answer 2

To anyone who doesn't want to use DATE_SUB, use CURRENT_DATE:

SELECT CURRENT_DATE - INTERVAL 30 DAY