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 [melt93] and [date97]. 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
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
distributions of PostgreSQL might not
compile these files.) To use those
files, first change to that directory and run 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
\i command reads in commands from 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