You can specify multiple criteria for a given column with MYSQL
So,
When looking for values between you could use an 'AND' like so...
select * from table where datestamp > '2003-01-01' and datestamp < '2003-02-01'
BUT!!! A much neater way is to use 'BETWEEN' like so...
select * from table where datestamp between '2003-01-01' and '2003-02-01'
Hope this helps
-Cheers