Need help getting mysql data

Question

I have two pages, page X has all the record and page Y has a record that is based  on a url paramater sent from page X, meaning at the end in the browser I have something like this:
the_site/item_detail.php?item_name=KEDS, CHUKKA, BLUE SLATE
The thing is, I want to get another record on page Y where I want to have some of the information of the first record which receives its URL paramater from page X.
More clear maybe:
On page Y, I have one record which receives its data info from a URL paramater sent from page X
on thi same page, I want to create another record and I would like this new record to use a column from the first one to get its data result.
Thank

Answer 1

I am retrieving data
on page Y there already a recordset that retrievs data based on the URL parameter sent from page X (recordset 1)
On the same page, I want to create another recordset (retrieve more data) and to retrieve this data (of recordset 2 on the same oage) I want to be able to use some information from recordset 1.
I hope your understand what I mean