Phụ thuộc hàm trong cơ sở dữ liệu quan hệ mở rộng

Đinh Thị Ngọc Thanh

Abstract



We introduced some constraints of incomplete data in the extended relational database by theory of linguistic variable and fuzzy sets. The constraints have a structure as well as functional dependencies. The same results of minimum cover and 3NF of relation are given in the extended RDB.


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Journal of Computer Science and Cybernetics ISSN: 1813-9663

Published by Vietnam Academy of Science and Technology