1 votes 1 votes Which one is correct w.r.t. RDBMS? primary key $\subseteq$ super key $\subseteq$ candidate key primary key $\subseteq$ candidate key $\subseteq$ super key super key $\subseteq$ candidate key $\subseteq$ primary key super key $\subseteq$ primary key $\subseteq$ candidate key Databases ugcnetcse-jan2017-paper3 database-normalization candidate-key + – go_editor asked Mar 24, 2020 • edited Mar 28, 2020 by go_editor go_editor 2.8k views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes In RDBMS there can be only one PK. We can have many Candidate Key, any of which can be chosen as PK by admin. Super key is obtained by adding zero or more attribute to candidate key. So B is correct. smsubham answered Apr 1, 2020 smsubham comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes In the Relation There is many Super Key Out of Which some of them are Candidate key . and there are one or more Candidate key but have only one Primary key . so , option B is correct Himanshu Kumar Gupta answered Sep 10, 2020 Himanshu Kumar Gupta comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes Ans : B primary key ⊆ candidate key ⊆ super key in RDBMS anjli answered Feb 6, 2021 anjli comment Share Follow See all 0 reply Please log in or register to add a comment.