How do I replace the information in a datatable with different selections from a combo box?

Microsoft Access - SQL

I've got the code right, as anytime a user selects a UID or NAME from each combo box the datatable fills that information based on that person's UID or NAME, however, how do I make it so that the datatable continuously replaces the newly selected information rather than keeping the previous information there?

Imagine this showing up on a data table...you select UID = 1 and Jason and his information shows up, but then you select NAME = Maria, her info shows up, but Jason's remains...I only want one of them showing up everytime I select it from the combo box...

My code:

SELECT eDiscovery.NAME, eDiscovery.CASE FROM eDiscovery WHERE (((eDiscovery.UID)=Forms!frmMarimba!cmbUID)) Or (((eDiscovery.NAME)=Forms!frmMarimba!cmbNAME));

This is in the Row Source code space for the form (frmMarimba). How can I make it so only one row of data appears everytime I select something different from the combo box? Thanks!