Real-time database is a theoretical model to describe the actual data, but installing it is an almost impossible. In this paper, the authors propose a simple type of the real-time database based on time series. In this model, three kinds of data are used such as: settled, actual and forecast corresponding to the real-time status is past, present and future. the authors conducted experiment to build the database forecast for a time in the future based on this model for the International Revenue database of Telstra, an Australia company. Results install proved effective, meet the requirements of actual synthesis report at any time for data. This paper has four parts: Part 1 presents the theoretical basis of a number of issues related to the theory of database time. The part 2 describes the database status. The part 3 are experiments and the last are conclusions.