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This chapter provides an overview of how to useSQL to perform simple operations. This tutorial is only intended to give you an introduction and is in no way a complete tutorial onSQL. Numerous books have been written onSQL, including[melt93] and[date97]. You should be aware that somePostgreSQL language features are extensions to the standard.

In the examples that follow, we assume that you have created a database namedmydb, as described in the previous chapter, and have been able to startpsql.

Examples in this manual can also be found in thePostgreSQL source distribution in the directorysrc/tutorial/. (Binary distributions ofPostgreSQL might not provide those files.) To use those files, first change to that directory and runmake:

$cd.../src/tutorial$make

This creates the scripts and compiles the C files containing user-defined functions and types. Then, to start the tutorial, do the following:

$psql -s mydb...mydb=>\i basics.sql

The\i command reads in commands from the specified file.psql's-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 filebasics.sql.