Abstract: A dimension table is populated with data records extracted from at least one source system with each data record being associated with identifying hash values and attribute hash values. Once the dimension table is established, a set of hash values is computed for an incoming set of data records. The incoming set of hash values may include at least one identifying hash value and at least one attribute hash value for each data record contained in the incoming set of data records. The method then searches the established dimension table for records having an identifying hash value identical with the identifying hash value of the incoming set of data records. Once a match is found, the method compares the attribute hash values of the records having the identical identifying hash values. If the attribute hash values are different, the method updates the dimension table with the incoming data record.