updating 2tables in database based on new record in record

in my datagrid i have allowed for updates. the datagrid is bound to an adodc, whose datasource is a SQL statement (ie not a table in the access database). the datagrid contains 3 columns - 2 from the products table in the database and 1 from a related price table. how do i reference these 3 fields (for an insert SQL statement) when adding and saving a new record (row) in the datagrid? if you need any additional information, please let me know! any help would be greatly appreciated!