The Sample Database
Pick up an SQL or database design book, and probably you’ll find a students/courses/teachers, customers/orders/products, or authors/books/publishers database. In a bow to convention, most of the SQL examples in this book use an authors/books/publishers sample database named books. Here are some things that you should know about books:
Recall from “Tables, Columns, and Rows” earlier in this chapter that a database appears to the user as a collection of tables (and nothing but tables). books contains five tables that contain information about authors, titles they’ve published, their publishers, and their royalties. Figure 2.21 depicts the tables and relationships in books by using the graphical conventions introduced earlier ...
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