Designing query to only show unique records



Hi

I am trying to get the results of a query to show only unique student
records (not duplicates). Is there a simple way to make the criteria
field do this? I am not too familiar with SQL.

I have a student_info table, a session_info table, and a
services_to_students table.
What I'd like to do is query the tables to get a list of all students
served between certain dates. Now, of course, between those dates,
any given student has been served more than once, so without
eliminating duplicates, a given student (tracked by a unique
student_record) will show up repeatedly.


Any ideas? Again, I know it's pretty simple, but I can't seem to do
it.
Any help is appreciated.

.



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