Abstract: A database of a data processing system includes a data warehouse that stores all of input data that are input. In the data processing system, an integration layer stores an integrated data after the input data are integrated to generate the integrated data, and an aggregation layer stores aggregated data after the integrated data are aggregated by at least the number of addition items or the number of non-addition items for each of one or more combinations of the non-addition items to generate the aggregated data. An analysis layer stores an analysis data after one aggregated data is selected from the aggregated data based on a condition necessary for generation of the analysis data set by a setting section. The analysis data are further extracted from the one aggregated data.