5. In 3NF there is preservation of all functional dependencies. In BCNF there may or may not be preservation of all functional dependencies. 6. It is comparatively easier to achieve. It is difficult to achieve. 7. Lossless decomposition can be achieved by 3NF. Lossless decomposition is hard ...
在课堂上,导师作了如下陈述: There is only one(or none) lossless BCNF decomposition for a relation, and two BCNF decompositions are lossless for a given R iff they are logically equal 我试着用矛盾来证明,假设有两个BCNF分解,并且找到了矛盾,但是找不到。对于为什么这是真的有直观的解释吗? 浏览0...
Careless decomposition may lead to a bad database design, leading to serious problems. Next TopicDBMS 1NF For Videos Join Our Youtube Channel:Join Now Send your Feedback to feedback@javatpoint.com Help Others, Please Share Preparation
bcnfprimary-key3nfdecomposition-algorithmcandidate-key UpdatedJun 6, 2022 Python xadityax/Database-Normalization Star0 Code Issues Pull requests Takes Database and Functional dependencies as Input and checks Normalization form and converts up to BCNF. ...