>I would change the suggestion from:
>>> SELECT datetime, ttoc(datetime),count(*) from tablename group by 2 into cursor busytime
>to
>>> SELECT datetime, hour(datetime),count(*) from tablename group by 2 into cursor busytime
>
>the first will give you a count for each distinct time, down to the second (or even fraction, not sure), so unless two events happened on exactly the same time, you would get a count of 1 for each time that anything happened. by taking the hour that events occurred, you get a count of how many events occurred during that hour. with a tad more effort, you can adjust the resolution.
>
>...int( (hour(datetime)*60+minute(datetime) )/15 )
>will give a count of events during a 15 minute period. don't expect any 0's to be returned. if there is no data during that time, there will be no summary of data of that time.

Good point....was working off the top of me head....