RDB structure chart display using fuzzy rules

With rapid spread of EUC (E_nd U_ser C_omputing), RDB (R_elational D¯ataB_ase) construction and retrieval using GUI (G_raphical U_ser I_nterface) have become a major part of information network users. Since main activity in the RDB construction is its structure design, it must be done efficiently in order to shorten the construction term. Although display function of RDB entire structure (table structures and relations between tables) defined by users is provided as a “structure chart” display function in most RDBMS (R_elational D¯ataB_ase M_anagement S_ystem) to support the activity, we can say that its quality is not high enough at present. For example, the chart contains many backward or intersecting arrows (relations between tables) and tables in the chart are not well-balanced. Therefore, it is not easy to grasp the entire structure by the present chart. This has been the cause of inefficiency in the RDB construction. In this paper, we propose a new method of making and displaying a high quality structure chart using BBM (B_ranch and B_ound M_ethod) and fuzzy inference as a solution to the above problems. Furthermore, we verify the effect of the proposed method in experiment