| 2.1. Introduction | ||||
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2.1. Introduction
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, includingUnderstanding the New SQL andA Guide to the SQL Standard. You should be aware that somePostgres Pro 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 thePostgres Pro source distribution in the directorysrc/tutorial/. (Binary distributions ofPostgres Pro 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.