MySQL query to check for certain phrases (duplicate article, plagiarism)

[hughesgorilla]

Is there a way to check for multiple phrases in mysql?I need to check if an article have a duplicate version stored in mysql. This is the algorithmI first create an array of sentences that needed to be check (removing all non-alpha-numeric characters)Then Build the query (how?)After I get the result I compare if 50% of the sentences are duplicate than I consider the article to be duplicate.Articles in the table are stored with removed non-alpha-numeric characters.Example:\[code\]iamdevelopingatooltocheckduplicatearticlesstoredinmysqldatabasehoweveriveencountered \[/code\]Any suggestions?