I am trying to have a input php/html file that contains drop down list from 2 different tables.

Table Name | Column1 | column2
customer | Cust_id | customer
Products | Prod_id |Item

I need to be able to select records from these table to insert in a third table (Orders)

here is my querry but I am not getting the right data.

SELECT `Company` from customer
SELECT `Item` from Products

also I tried :
SELECT COUNT(*) AS `Rows`, `Item`, `Company`, `Type` FROM `test3` GROUP BY `Item` ORDER BY `Item`

can someone help please?