1. A method in a telecommunication database system for obtaining data for a requesting party from a database containing data entries for a plurality of objects, the method comprising the steps of: making a query for data from a wanted data entry, wherein the database comprises an original dataset with data entries holding original data for the objects and an auxiliary dataset with data entries holding updated data for at least some of said objects, wherein the data entries in the original dataset contain a first dataset tag and the data entries in the auxiliary dataset contain a second dataset tag, said dataset tags indicating to which dataset each entry belongs, and wherein each data entry in the auxiliary dataset and a corresponding data entry in the original dataset both refer to the same object such that the original and auxiliary datasets present different views of data for the same objects; and, obtaining data of the wanted data entry for the requesting party from one of said original and auxiliary datasets which is determined to be valid for said requesting party based on the dataset tag in said data entry.