MySQL Query GROUP BY day / month / year

Is it possible to 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

​x
 
SELECT COUNT(id)FROM statsWHERE record_date.YEAR = 2009GROUP BY record_date.YEAR​

Or even:

SELECT COUNT(id)
FROM stats
GROUP BY record_date.YEAR, record_date.MONTH

 
SELECT COUNT(id)FROM statsGROUP BY record_date.YEAR, record_date.MONTH​

To have a monthly statistic.

Thanks!

Answer

GROUP BY YEAR(record_date), MONTH(record_date)

 
GROUP BY YEAR(record_date), MONTH(record_date)​

Check out the date and time functions in MySQL.

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Answer