Creating Directory Search Engine

Hi All, I am trying to build a search engine for a directory. So far I have setup a table of keywords [ id | category_id | keyword ] with a single keyword and the category that it refers to. Then I have a table of categories [ cat_id | parent_id | cat_name ] and a table of vendors linked to the corresponding category_id. Basically the trouble arises when searching for multiple keywords because there is only one word in each record. I am trying to do this in a single query, but it seems that there must be a better way. For example TABLE keywords [ id | category_id | keyword ] ex. records 1 | 10 | auto 2 | 10 | car 3 | 10 | repair 4 | 20 | auto 5 | 20 | car 6 | 20 | new 7 | 20 | sales These keywords refer to the categories 'auto repair' (cat_id = 10) and 'new auto sales' (cat_id = 20) So a search for 'auto' should return vendors in both categories while a search for 'auto repair' should return just category 10 Make sense? Please let me know of a good strategy for this - I imagine that it is quite common. Thanks much, olinux __________________________________________________ Do You Yahoo!? Send FREE Valentine eCards with Yahoo! Greetings! http://greetings.yahoo.com