The source code of the examples in this book

All the source code of the book is available as individual files with the downloadable source code. Almost every file name includes the number of the chapter it belongs to and a suffix that indicates the type of file. In most cases, this will be sql, which denotes the SQL script. Files with the output extension are not runnable code; instead, these are the output of commands. As an example, the Chapter3_Listing01.sql file is the first listing script from Chapter 3, The PL/pgSQL Language, while Chapter3_Listing01.output is the textual result of the execution of the former file. Both are shown with the listing number 3. 

Please note that the code formatting in the source files and the code snippets of the book are not exactly the same due to typographical constraints.