Given the basic ER and relational models, which of the following is INCORRECT?
A. An attribute of an entity can have more than one value
B. An attribute of an entity can be composite
C. In a row of a relational table, an attribute can have more than one value
D. In a row of a relational table, an attribute can have exactly one value or a NULL value
Answer:A
Given the basic ER and relational models, which of the following is INCORRECT?
A. An attribute of an entity can have more than one value B. An attribute of an entity can be composite C. In a row of a relational table, an attribute can have more than one value D. In a row of a relational table, an attribute can have exactly one value or a NULL value
Explanation:It is possible to have several values for a single attribute provide it is a multi-valued attribute.