postgresql-15-A4-官方详细文档.pdfVIP

PostgreSQL 15beta4 Documentation The PostgreSQL Global Development Group PostgreSQL 15beta4 Documentation The PostgreSQL Global Development Group Copyright © 1996–2022 The PostgreSQL Global Development Group Legal Notice PostgreSQL is Copyright © 1996–2022 by the PostgreSQL Global Development Group. Postgres95 is Copyright © 1994–5 by the Regents of the University of California. Permission to use, copy, modify, and distribute this software and its documentation for any purpose, without fee, and without a written agreement is hereby granted, provided that the above copyright notice and this paragraph and the following two paragraphs appear in all copies. IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN “AS-IS” BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAIN- TENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. Table of Contents Preface xxxii 1. What Is PostgreSQL? xxxii 2. A Brief History of PostgreSQL xxxii 2.1. The Berkeley POSTGRES Project xxxiii 2.2. Postgres95 xxxiii 2.3. PostgreSQL xxxiv 3. Conventions xxxiv 4. Further Information xxxiv 5. Bug Reporting Guidelines xxxv 5.1. Identifying Bugs xxxv 5.2. What to Report xxxvi 5.3. Where to Report Bugs xxxvii I. Tutorial 1 1. Getting Started 3 1.1. Installation 3 1.2. Architectural Fundamentals 3 1.3. Creating a Database 3 1.4. Accessing a Database 5 2. The SQL Language 7 2.1. Introduction 7 2.2. Concepts 7 2.3. Creating a New Table 7 2.4. Populating a Table With Rows 8 2.5. Queryin