Explanation:
Selection, projection and join capabilities of a SELECT statement are performed in this view.
Incorrect Answers:
2: Selection is performed in this query, not difference. There is no capability with name difference for a SELECT statement exists.
3: There is no intersection in this SELECT statement used.
4: There is no intersection in this SELECT statement used.
5: There is no difference or product capabilities exist for a SELECT statement.
OCP Introduction to Oracle 9i: SQL Exam Guide, Jason Couchman, p. 20-21
Chapter 1: Overview of Oracle Databases

---