[font=verdana]You can use robots.txt to block search engine spiders from accessing parts of your site*, if that’s what you want to do:
but that asks robots not to look at anything in the “mypage” folder, which would include the index page, so that probably wouldn’t work for you.
Another option, which might or might not work for you, would be to create a rewrite regex to redirect mydomain.com/mypage/var-value-* to mydomain.com/mypage/ - it depends whether the DB needs that extra parameter to generate the page or if it’s just an artefact.
* OK, technically it’s “suggest that the might not want to look there”, but most search robots are well-behaved and do what they’re asked.[/font]