Chapter 2. The SQL Language
2.1. Introduction
This chapter provides an overview of how to use SQL to perform simple operations. This tutorial is only
intended to give you an introduction and is in no way a complete tutorial on SQL. Numerous books have
been written on SQL, including Understanding the New SQL and A Guide to the SQL Standard. You
should be aware that some PostgreSQL language features are extensions to the standard.
In the examples that follow, we assume that you have created a database named
mydb
, as described in the
previous chapter, and have started psql.
Examples in this manual can also be found in the PostgreSQL source distribution in the directory
src/tutorial/
. Refer to the
README
file in that directory for how to use them. To start the tutorial, do
the following:
$
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