PostgreSQL是一个功能强大,开源对象关系型数据库系统。它拥有超过15年的持续开发和经验证的体系结构,赢得了良好的声誉:可靠性,数据完整性和正确性。

这是一个快速学习PostgreSQL和PostgreSQL编程的入门教程。

PostgreSQL是什么?

PostgreSQL(发音post-gress-Q-L)是一个开放源码的关系数据库管理系统(DBMS),由世界各地的志愿者队伍开发。 PostgreSQL是不控制任何公司或其他私人实体和源代码是免费提供的。

简史

PostgreSQL最初称为Postgres,在UCB由一个名为迈克尔·斯通布雷克的计算机科学教授-斯通布雷克Postgres于1986年开发,它的前身安格尔现在所拥有的计算机协会后续项目。

  1. 1977-1985:开发所谓的INGRES项目。

  • 证明了关系数据库的概念

  • 在1980年建立了公司安格尔

  • 在1994年由计算机关联购买

  • 1986-1994: POSTGRES

    • Development of the concepts in INGRES with a focus on object orientation and the query language Quel

    • The code base of INGRES was not used as a basis for POSTGRES

    • Commercialized as Illustra (bought by Informix, bought by IBM) 

  • 1994-1995: Postgres95

    • Support for SQL was added in 1994

    • Released as Postgres95 in 1995

    • Re-released as PostgreSQL 6.0 in 1996

    • Establishment of the PostgreSQL Global Development Team

    PostgreSQL主要特点

    PostgreSQL能够运行在所有主流操作系统,包括Linux,UNIX(AIX,BSD,HP-UX,SGI IRIX,Mac OS X,Solaris,Tru64)和Windows。它支持文字,图片,声音和视频,包括C/C ++,Java中,Perl,Python和Ruby中,TCL和开放式数据库连接(ODBC)的编程接口。

    PostgreSQL支持SQL标准很大一部分,并提供许多现代化的功能,包括以下内容:

    • Complex SQL queries

    • SQL Sub-selects

    • Foreign keys 

    • Trigger

    • Views

    • Transactions

    • Multiversion concurrency control (MVCC)

    • Streaming Replication (as of 9.0)

    • Hot Standby (as of 9.0)

    您可以查看PostgreSQL的官方文档,了解上述功能。 PostgreSQL可以在许多方面,例如通过增加新的用户扩展:

    • Data types

    • Functions

    • Operators 

    • Aggregate functions

    • Index methods

    程序语言支持

    PostgreSQL支持四个标准的程序语言,它允许用户在任何语言编写自己的代码,它可以执行PostgreSQL数据库服务器。这些程序语言 - PL/pgSQL的,PL/ TCL,PL/ Perl和PL/ Python。此外,其他非标准程序语言,如PL/ PHP,PL/V8,PL/ Ruby中,PL/ Java等也支持。


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