Given the basic ER and relational model which of the following is incorrect?Marks : 1Negative Marks : 0Answer hereAn entity can have more than one attributeAn attribute of an entity can be compositeIn row of a relational table, an attribute have more than one value.In row of a relational table, an attribute can have exactly one vlaue or a NULL value.
Question
Given the basic ER and relational model which of the following is incorrect?Marks : 1Negative Marks : 0Answer hereAn entity can have more than one attributeAn attribute of an entity can be compositeIn row of a relational table, an attribute have more than one value.In row of a relational table, an attribute can have exactly one vlaue or a NULL value.
Solution
The incorrect statement is: "In row of a relational table, an attribute can have more than one value."
Explanation: In a relational database model, each attribute in a row of a table can have exactly one value or a NULL value. It cannot have more than one value. This is because each cell in a table holds a single data element. If an attribute needs to have more than one value, it would require a separate row or a separate table to maintain the relational structure.
Similar Questions
In a row of a relational table, an attribute can have more than one valueIn a row of a relational table, an attribute can have exactly one value or a NULL valueAn attribute of an entity can be compositeAn attribute of an entity can have more than one value
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Consider the entities A1 and A2 in an ER diagram have simple single-valued attributes. B1 and B2 are the relations between A1 and A2. B1 is a one-to-many and B2 is a many-to-many relationship. There are no attributes present in B1 and B2. How many tables are required to represent this given model?3254
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