DATA BASE INQUIRY SYSTEM USING VENN DIAGRAM

摘要

PURPOSE: To attain the inquiry of a data base in various conditional expressions where the truth/falsehood value of conditions are combined together just by pointing a Venn diagram area that is secured on an inquiry window. ;CONSTITUTION: An inquiry window 1 has a Venn diagram that displays a closed curve showing a partial set where the condition designated by an input device 2 is satisfied for inquiry of all records included in an inquiry object as a total set. An inquiry window control means 4 draws a closed curve in the Venn diagram or deletes it and synthesizes an inquiry conditional expression from the designated conditions to give an inquiry execution request to a data base server 5 in response to the event generated at the window 1 and based on a Venn diagram display information storage area 3. An inquiry result output means 7 displays the records on an output device 8 or prints them which are retrieved out of a data base by the server 5 and stored in an inquiry result storage area 6.;COPYRIGHT: (C)1996,JPO