Looping - Oracle

Konsep sederhana
BEGIN
FOR SV IN
(
SELECT ID_BRG, ID_GDG, SUM(QTY_SLS_INV_DTL) AS QTY_SV FROM SLS_INV_DTL
GROUP BY ID_BRG, ID_GDG
)
LOOP
        UPDATE T_HPP_SUMMARY
        SET QTY_SV=SV.QTY_SV
        WHERE ID_BRG=SV.ID_BRG AND ID_GDG=SV.ID_GDG;
 COMMIT;
 END LOOP;     
 END;