MySQL Query GROUP BY day / month / year

Is it possible I make a simple query to count how many records I have in a determined period of time like a Year, month or day, having a TIMESTAMP field, like:
SELECT COUNT(id)
FROM stats
WHERE record_date.YEAR = 2009
GROUP BY record_date.YEAR
Or even:
SELECT COUNT(id)
FROM stats
GROUP BY record_date.YEAR, record_date.MONTH
To have a monthly statistic.
Thanks!

Answer:

GROUP BY YEAR(record_date), MONTH(record_date)
Check out the date and time functions in MySQL.
http://stackoverflow.com/questions/508791/mysql-query-group-by-day-month-year/508806#508806

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