Given the basic ER and relational models, which of the following is INCORRECT? , Given the basic ER and relational models, which of the following is INCORRECT?

Solution

C. In a row of a relational table, an attribute can have more than one value

Explanation

Ans is C.

because

The term ‘entity’ belongs to ER model and the term ‘relational table’ belongs to relational model. A and B both are true. ER model supports both multivalued and composite attributes See this for more details. (C) is false and (D) is true. In Relation model, an entry in relational table can can have exactly one value or a NULL.