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OCA/OCP Oracle Database 12c All-in-One Exam Guide (Exams 1Z0-061, 1Z0-062, & 1Z0-063), 2nd Edition by Bob Bryla, Roopesh Ramklass, John Watson

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CHAPTER 11

Subqueries and Set Operators

Exam Objectives

In this chapter, you will learn to

• 061.7.1    Define Subqueries

• 061.7.2    Describe the Types of Problems that the Subqueries Can Solve

• 061.7.3    Describe the Types of Subqueries

• 061.7.4    Write Single-Row and Multiple-Row Subqueries

• 061.8.1    Describe Set Operators

• 061.8.2    Use a Set Operator to Combine Multiple Queries into a Single Query

• 061.8.3    Control the Order of Rows Returned

The previous chapters have dealt with the SELECT statement in considerable detail, but in every case the SELECT statement has been a single, self-contained command. This chapter is the first ...

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