Table of Contents
## Chapter 19. Some Common Data Manipulation Problems

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In this chapter, I discuss a number of problems that you may encounter when dealing with data, along with possible solutions. I suggest that you try to find a solution before reading the solution in the text. Also, I should mention that there are usually many different ways of solving a given problem. In fact, you may very well be able to find a more efficient solution than the one given. The main purpose of these problems and solutions is to give you some food for thought.

Before beginning, let us note that many of the upcoming solutions involve the use of subqueries. We discussed subqueries in Chapter 6, but let us review quickly here.