If you need to delete an attribute in a relation, you can use the _______ operation.
A) join
B) project
C) union
D) intersection

Question

Quizplus · Accepted Answer

The project operation is used to delete an attribute in a relation. It selects certain attributes from a relation and discards the others. Join operation combines two or more relations to form a new relation. Union operation combines two or more relations into one, whereas intersection operation gives the common data in two or more relations.

If You Need to Delete an Attribute in a Relation