sql: search multiple keywords for one image

[md_doc]

I am doing the search for multiple keywords.
ok, let say user input keywords : one two three to search an image.(exactly words)
in the database, there is an image with the keywords : one, two.
May I know how to query it out for one time only? Even if this image have two match keywords, but it only can display out one time in the search result. can someone please guide me? i do not how to query it out. Please help.thank you.

[BigAlReturns]

Could you use the UNIQUE modifier in this instance? E.g.

SELECT UNIQUE image_id,etc FROM table WHERE conditions