7.2,7.3 6.5 How can results from two SQL queries be combined? Differentiate how the INTERSECT and EXCEPT commands work. 6.6 Differentiate between the three types of subqueries. Why is it important to understand the nature of subquery result before you write an SQL statement?7.2 Discuss the functionality and importance of the Integrity Enhancement Feature (IFF). 7.3 What are the privileges commonly granted to database users?.