using LIKE in SQL query with activerecord

[eluser]mandril[/eluser]
Hi everyone, i have a problem with LIKE.. it seems to not be working properly...

Im developing an e-commerce and need to get the related products, for that reason the table product has a field called : tags.

Here is my method... that returns nothing, and if i remove the p1.id != p2.id it returns the product itself.. quite logic.

Code:

public function getRelatedProducts($idProd)
{

$query = $this->db->query("SELECT p1.id, p1.name FROM product p1, product p2 WHERE p1.id='".$idProd."'  AND p1.id != p2.id AND p1.tags LIKE p2.tags");

return $query;

}

Ok help me analyze step by step..

I need to grab the name and the id of the product so...

SELECT p1.id, p1.name seems fine

I need to compare a product with other products..

FROM product p1, product p2 seems fine

Now i need that one of the product is the one the customer is viewing .. that variable is $idProd

WHERE p1.id='".$idProd."' AND seems fine

I dont need to get the name of the product itself as a related product so..

p1.id != p2.id seems fine

I have to get similar tags.. so i use LIKE

AND p1.tags LIKE p2.tags is this working ?

a product has a tag like this: cellphone sony ericsson cam

and i put a similar tag to other product: cellphone motorola cam

AND I GET NO RESULT....

Thnx for your help