in case you want to know how to do this, the form is:
SELECT sum(if(date>CURRENT_DATE()-INTERVAL 30 DAY, 1,0))
FROM table
returns number of records where date is more than 30 days ago
Just keep adding this form for addtional intervals
SELECT sum(if(date>CURRENT_DATE()-INTERVAL 30 DAY, 1,0)).
sum(if(date>CURRENT_DATE()-INTERVAL 30 DAY&&date<CURRENT_DATE()-INTERVAL 60 DAY, 1,0)),
sum(if(date>CURRENT_DATE()-INTERVAL 60 DAY&&date<CURRENT_DATE()-INTERVAL 90 DAY, 1,0))
FROM table
etc