System requirementsThe following functions are required for the system through investigation(1) Because the computer knowledge of the operator is generally poor, it requires a good man-machine community(2) Because the system uses many objects, it requires better authority management(3) The original data modification is simple and convenient, supporting multi-conditional modification(4) Convenient data query, support multi-condition query;(5) Under the corresponding authority, the deletion of data is convenient and simple, and the data stability is good(6) Data calculation can be completed automatically to minimize manual labor: