Welcome to PostgreSQL and the
    PostgreSQL Tutorial.  The following few
    chapters are intended to give a simple introduction to
    PostgreSQL, relational database
    concepts, and the SQL language to those who are new to any one of
    these aspects.  We only assume some general knowledge about how to
    use computers.  No particular Unix or programming experience is
    required.  This book is mainly intended to give you a hands-on
    experience with important aspects of the PostgreSQL system.  It
    makes no attempt to be a complete or thorough treatment of the
    topics it covers.
   
    After you have worked through this tutorial you might want to move
    on to reading the PostgreSQL 7.3 User's Guide to gain a more formal knowledge of
    the SQL language, or the PostgreSQL 7.3 Programmer's Guide for information about
    developing applications for PostgreSQL.
    Those who set up and manage their own server should also read the
    PostgreSQL 7.3 Administrator's Guide.