I have taken a look at the Event Management database. I downloaded it from
the Microsoft web site and immediately ran the table analyzer, which found
"problems" and "fixed" them by breaking the Events table into three tables,
creating a query named Events from those three tables, and renaming the
Events table Events_OLD. Absurdly (to me anyhow) it decided that a start
time of 9:00 and an end time of 5:00 for three events was repeated
information, so it made a table for that. It also made a table for
Locations, which probably should have been there in the first place, but for
some reason moved Employee ID to that table.
If you have not changed any of the data or design since making the changes
you should be able to undo them by deleting any queries that have taken over
the names of previous tables (that have since been renamed with an OLD
suffix), renaming the tables to their original names, and re-creating the
relationships. To see a table in the Relationships window, right click a
blank spot on the window and select Show Table. Drag a field from one table
to another to re-establish the relationship. Best suggestion is to download
the template again and use that as a guide.
The template has a number of elements that could turn out to be problems.
For instance, it uses lookup fields in the tables. I won't try to get into
the details of that, except to say they can cause mysterious problems with
queries and other attempts to filter and otherwise manipulate the data. It
may be OK if you do not add to the database, but could be a consideration as
your skills develop and you attempt modifications.
Since you are a self-identified novice you may benefit from some reading
about Access. This is a very good place to start:
http://allenbrowne.com/casu-22.html
This page contains more information, including the above link:
http://allenbrowne.com/tips.html
Of special interest at the moment see Tips for Casual Users. Also, check
out the Links at the bottom right side of the page.