The _______ operator takes the results of two queries and returns only rows that appear in both result sets.
A. Union
B. Intersect
C. Difference
D. Projection
Answer:A
The _______ operator takes the results of two queries and returns only rows that appear in both result sets.
A. Union B. Intersect C. Difference D. Projection
Explanation:The union operator gives the result which is the union of two queries and difference is the one where query which is not a part of second query . 9. A ________ is a pictorial depiction of the schema of a database that shows the relations in the database, their attributes, and primary keys and foreign keys.