Thus, the super key is the super set, the candidate key is the subset, and the primary key is the sub-subset of the superkey. Next TopicPrimary Key in DBMS For Videos Join Our Youtube Channel:Join Now Send your Feedback to feedback@javatpoint.com ...
From above arrow diagram on R, we can see that an attribute Y is not determined by any of the given FD, hence Y will be the integral part of the Candidate key, i.e. no matter what will be the candidate key, and how many will be the candidate key, but all will have Y compulsory...