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 docs package in the directory tutorial/. Refer to the README file in that directory for how to use them. To start the tutorial, do the following:
$ cd /usr/share/doc/postgresql-docs-NNN/tutorial $ psql -s mydb ... mydb=> \i basics.sql
The \i command reads in commands from the specified file. The -s option puts you in single step mode which pauses before sending each statement to the server. The commands used in this section are in the file basics.sql.