- Table of Contents
- 1.1. Installation
- 1.2. Architectural
Fundamentals
- 1.3. Creating
a Database
- 1.4. Accessing
a Database
Before you can use PostgreSQL you need to install it,
of course. It is possible that PostgreSQL is already
installed at your site, either because it was included in your operating system
distribution or because the system administrator already installed it. If that is the
case, you should obtain information from the operating system documentation or your system
administrator about how to access PostgreSQL.
If you are not sure whether PostgreSQL is already
available or whether you can use it for your experimentation then you can install it
yourself. Doing so is not hard and it can be a good exercise. PostgreSQL
can be installed by any unprivileged user, no superuser (root)
access is required.
If you are installing PostgreSQL yourself, then refer
to the PostgreSQL 7.3
Administrator's Guide for instructions on installation, and return to this guide
when the installation is complete. Be sure to follow closely the section about setting up
the appropriate environment variables.
If your site administrator has not set things up in the default way, you may have some
more work to do. For example, if the database server machine is a remote machine, you will
need to set the PGHOST environment variable to the name of the
database server machine. The environment variable PGPORT may also
have to be set. The bottom line is this: if you try to start an application program and it
complains that it cannot connect to the database, you should consult your site
administrator or, if that is you, the documentation to make sure that your environment is
properly set up. If you did not understand the preceding paragraph then read the next
section.
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