name and sum in querie

[nile80]

problem is. when I reduce IDKonto to 4 digit I want to name change to name in Konto table. for example. in table IDKonto I have 21130001 named aaaaa, 21130002 named bbbbb, 21130003 named cccc and 2113 named "abc". when I reduce digit to 2113 I want in Querie Razdv sum (21130001,21130002,2113003 =300 and name "abc").

[ArviLaanemets]

SELECT Int(prom.Konto/10000) AS Konto4, k.NazivKonta, Sum(prom.Duguje)
FROM Promjene AS prom LEFT JOIN Konto AS k ON k.IDKonto =  Int(prom.Konto/10000)
WHERE k.IDKonto BETWEEN 1000 AND 9999
GROUP BY Int(prom.Konto/10000), k.NazivKonta;