14. Working with Subqueries
In this chapter, you learn what subqueries are and how to use them.
SELECT statements are SQL queries. All the
SELECT statements you have seen thus far are simple queries: single statements retrieving data from individual database tables.
New Term: Query
Any SQL statement. However, the term is usually used to refer to
SQL also enables you to create subqueries: queries that are embedded into other queries. Why would you want to do this? The best way to understand this concept is to look at a couple of examples.