RETRIEVING DEVICE FOR DATABASE

PROBLEM TO BE SOLVED: To provide a database retrieval system whereby retrieval is executed efficiently in an interactive form. SOLUTION: A retrieving device 2 for executing retrieval of a database 1 is constituted by adding a retrieval module 21, a retrieval condition input module 22, a view definition module 23, a view re-definition module 24 and a view removal module 25. The retrieval module 21 temporarily preserves a retrieval result coincident with a retrieval condition through the user of a view function as virtual data, successively processes retrieval corresponding to another retrieval condition of the virtual data and converges dada. At this time, a screen urging the input of the retrieval condition and the input of a succeeding processing request is displayed in a screen and the interactive form is realized.