PostgreSQL User's Guide The PostgreSQL Development Team Edited by Thomas Lockhart PostgreSQL User's Guide by The PostgreSQL Development Team Edited by Thomas Lockhart PostgreSQL is Copyright © 1996-2000 by PostgreSQL Inc. Table of Contents Table of Contents . i List of Tables . xiv List of Examples . xvi Summary. i Chapter 1. Introduction. 1 What is Postgres? . 1 A Short History of Postgres . 1 The Berkeley Postgres Project . 2 Postgres95. 2 PostgreSQL . 3 About This Release . 4 Resources. 4 Terminology . 5 Notation . 6 Problem Reporting Guidelines . 6 Identifying Bugs. 6 What to report . 7 Where to report bugs . 9 Y2K Statement . 9 Copyrights and Trademarks . 10 Chapter 2. SQL Syntax . 11 Key Words. 11 Reserved Key Words. 11 Non-reserved Keywords . 14 Comments . 15 Names. 16 Constants . 16 String Constants . 16 Integer Constants. 17 Floating Point Constants. 17 Constants of Postgres User-Defined Types . 17 Array constants . 18 Fields and Columns . 18 Fields. 18 Columns . 19 Operators. 19 Expressions . 19 Parameters . 20 Functional Expressions . 20 Aggregate Expressions . 20 Target List . 21 Qualification. 21 From List . 21 Chapter 3. Data Types . 23 Numeric Types . 25 The Serial Type . 26 Monetary Type . 26 Character Types . 27 Date/Time Types . 28 i Date/Time Input . 28 Date/Time Output . 33 Time Zones. 34 Internals . 34 Boolean Type. 35 Geometric Types . 35 Point . 36 Line Segment . 36 Box . 36 Path. 37 Polygon . 37 Circle . 38 IP Version 4 Networks and Host Addresses . 38 CIDR. 39 inet . 39 Chapter 4. Operators . ..