PostgreSQL 9.4 Documentation

• 语言: 英语
• 格式: .pdf
• 来源: www.postgresql.org

摘要

PostgreSQL 9.4.26 Documentation The PostgreSQL Global Development Group PostgreSQL 9.4.26 Documentation by The PostgreSQL Global Development Group Copyright © 1996-2020 The PostgreSQL Global Development Group Legal Notice PostgreSQL is Copyright © 1996-2020 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, INCI- DENTAL, 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 IM- PLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HERE- UNDER IS ON AN “AS-IS” BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. Table of Contents Preface .....................................................................................................................................................xlv 1. What is PostgreSQL?..................................................................................................................xlv 2. A Brief History of PostgreSQL................................................................................................. xlvi 2.1. The Berkeley POSTGRES Project ............................................................................... xlvi 2.2. Postgres95.................................................................................................................... xlvii 2.3. PostgreSQL.................................................................................................................. xlvii 3. Conventions............................................................................................................................. xlviii 4. Further Information................................................................................................................. xlviii 5. Bug Reporting Guidelines....................................................................................................... xlviii 5.1. Identifying Bugs........................................................................................................... xlix 5.2. What to Report ............................................................................................................. xlix 5.3. Where to Report Bugs ...................................................................................................... li I. Tutorial....................................................................................................................................................1 1. Getting Started ...............................................................................................................................1 1.1. Installation.........................................................................................................................1 1.2. Architectural Fundamentals...............................................................................................1 1.3. Creating a Database...........................................................................................................2 1.4. Accessing a Database ........................................................................................................3 2. The SQL Language ........................................................................................................................6 2.1. Introduction .......................................................................................................................6 2.2. Concepts ............................................................................................................................6 2.3. Creating a New Table ........................................................................................................6 2.4. Populating a Table With Rows ..........................................................................................7 2.5. Querying a Table ...............................................................................................................8 2.6. Joins Between Tables.......................................................................................................10 2.7. Aggregate Functions........................................................................................................12 2.8. Updates............................................................................................................................14 2.9. Deletions..........................................................................................................................14 3. Advanced Features.......................................................................................................................16 3.1. Introduction .....................................................................................................................16 3.2. Views ...............................................................................................................................16 3.3. Foreign Keys....................................................................................................................16 3.4. Transactions.....................................................................................................................17 3.5. Window Functions...........................................................................................................19 3.6. Inheritance ..................................................................