UGC-NET | UGC-NET CS 2017 Dec 2 | Question 18

Match the following with respect to RDBMS :

(A) (1)
(B) (2)
(C) (3)
(D) (4)

Answer: (B)
Explanation: Codd’s rule says that entity integrity must be maintained so that no duplicate record exist in DB.
In RDBMS table column entry must be valid, It also comes under codd’s rule.
Referential data items strictly follows integrity on insertion, deletion and modification of table and user defined integrity constraints enlist some specific business rule, these rule don’t fall into entity or domain.

So, option (B) is correct.

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