Returning records from the last 3 months only in MySQL

Question

I have a table with a timestamp field. How do I get data from the last 3 months?

In particular, March is my current month let say, 03/2012. I need to retur

Answer 1

3 months before today:

select * from table where timestamp >= now()-interval 3 month;

Start with first of month:

select * from table where timestamp >= last_day(now()) + interval 1 day - interval 3 month;