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 been able to start psql.
Examples in this manual can also be found in the PostgreSQL source distribution in the directory src/tutorial/
. (Binary distributions of PostgreSQL might not compile these files.) To use those files, first change to that directory and run make:
$ 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:
$ cd ..../tutorial $ 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 file basics.sql
.
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