your SQL Syntax for the where clause is off:
WHERE idcategory_product=colname || idcollection_product=colname2
should be:
WHERE idcategory_product=colname OR idcollection_product=colname2
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.