Abstract: The invention relates to a method for synchronization of source data sets of a source database stored on a source system with representative target data sets in a target database database database stored on a target system, the source data sets being of a first type and the target data sets being of a second type. The source data sets are compared with the previous source data sets to obtain difference source data sets of the first type. The difference source data sets are transformed into transformed data sets of the second type and supplied to the target system to enable updating of the representative target data sets. Preferably, the transformation is performed via data sets of a third type, which allows to implement external business generation.