Help Newbie... Data report Question

In my data report, I need to show the summary of all the logs in the system. In my logs database the field names are: student number, lastname, firstname, time in, time out and date. And since a user may login as many times as they want I need to summarize how many times a user logged in within a specified date. That would be the summary that I must show in my data report. How can I count the number of times a user logged in depending on the date and on the list of logs? (I hope you can understand what I'm saying :blush: ... sorry). And another: How can I link my data report to a MS Access table?

Thanks in advance!