Thread Subject: taking datas from access database

i have an access database such as
provinces-----Month-----Tmean
Istanbul------January-----2
Istanbul-----february-----6
Istanbul-----March-------8
Istanbul-----May---------12
Istanbul----june---------18

i made a matlab gui for selecting itemss (datas ) from this database
i Have two popup menu (combobox) and one edit text
one of popup menu (combobox) is for provinces
other popup menu (combobox) is for month

I want to make a gui program whose datas select by users from database access
such as
if user select Istanbul in popup menu1 (combobox1) and select March in popup menu2 (combobox2) then the gui program will write in edit bx that Tmean was 8
i will ver appreciate for any help.I wish i explain my problem