No, it's not normal. The Moodle database has about 40 tables in it.
Since your site is still running it means you're either looking at the wrong database, or phpmyadmin isn't working properly.
You may want to try the Moodle version of phpmyadmin which you can get from here: http://moodle.org/mod/resource/view.php?id=8
General developer forum
Databases: DB Qusetion/Problem
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