📅  最后修改于: 2020-11-19 09:21:30             🧑  作者: Mango
当我们选择哪种数据库软件最适合我们的项目时,最重要的是在数据库之间进行比较。 PostgreSQL和MySQL都是开源社区提供的两种最受欢迎和使用最广泛的数据库软件。这两个数据库都有其优点,因此组织的更好选择取决于特定的要求和目标。在进行比较之前,我们将简要讨论这些数据库。
PostgreSQL是一个开放源代码,跨平台和对象关系数据库管理系统(ORDBMS),它是用C编程语言正式编写的。最初,它是在加利福尼亚大学计算机科学系引入的。它提供了非常简单的设置和安装。它已经支持SQL和NoSQL查询语言。它提供安全存储的数据,并且可以在处理请求时恢复。它符合ACID,高度并发,还支持功能,存储过程和触发器。它具有MVCC(多版本并发控制),允许多个用户一次在系统上工作。
MySQL是用于管理关系数据库的开源且流行的数据库管理系统。 Oracle提供了访问和管理该数据库的支持。与其他数据库相比,它是快速,可伸缩且易于使用的数据库管理系统。它通常与PHP脚本一起使用,以创建功能强大且动态的服务器端或基于Web的企业应用程序。
它作为客户端-服务器体系结构工作,客户端通过图形用户界面(GUI)发出请求,并且一旦指令匹配,服务器将提供所需的输出。
它由瑞典公司MySQL AB开发和支持,并用C和C++编程语言编写。许多大小公司都使用MySQL。 MySQL支持使用C,C++和Java语言的许多操作系统,例如Windows,Linux,MacOS等。
让我们通过表格形式比较两个数据库。尽管PostgreSQL和MySQL都是顶级的关系数据库管理系统(RDBMS),但是它们之间还是存在根本差异。
Parameter | PostgreSQL | MySQL |
---|---|---|
Definition | PostgreSQL is an open-source, cross-platform, and object-relational database management system (ORDBMS) built in the computer science department, University of California. | It is an open-source, cross-platform relational database management system built by Swedish Company MYSQL AB and currently supported by the Oracle. |
Known as | PostgreSQL is a more densely featured database system. It is described as the most advanced open-source database version of Oracle in the world. | MySQL is known for its fast speed, but it is less featured than PostgreSQL. It is the most popular database among the organization. |
Release | It was released as Postgre95 in May 1995. | It was released in 1995. |
Licensing | It is license under the MIT-style. | It is license under the GNU (General Public License). |
Pronounce | It is pronounced as post gress queue ell. | It is pronounced as my ess queue ell. |
Programming Languages
Implementation |
It is written in C. | It is written in C/C++. |
Popularity | PostgreSQL is popular among the developers who come from the Oracle or SQL Server background. | MySQL is popular among developers because of its fast speed and ease of use. |
GUI Tool | It provides PgAdmin GUI. | It provides MySQL Workbench GUI. |
Storage Engine | PostgreSQL is a unified database server having a single storage engine. | MySQL has a multi-layer structure having a set of storage engines. For example, InnoDB, MyISAM. |
ACID Compliance | It has the complete support of ACID-compliant. | Only some versions are ACID-compliant. |
Main Focus | PostgreSQL is developed with a focus on features and standards. | MySQL is developed with a focus on speed. |
Used | PostgreSQL is generally used on large and complex operations. It is more reliable for them. | MySQL is generally used on simple operations. |
Security | It has Native SSL support. | It has TLS support. |
Provides | PostgreSQL provides reliability, data integrity, and developers-friendly features. | MySQL is generally used with PHP to deal with web pages and optimize simple queries. |
Temporary Table | It does not have a TEMP or TEMPORARY keyword in the DROP TABLE statement. | It has a TEMP or TEMPORARY keyword in the DROP TABLE statement to remove the temporary table. |
Table Inheritance | It supports. | It does not Support. |
Replication | Asynchronous, Cascade, and Synchronous. | Asynchronous, Synchronous, and Semi-synchronous. |
Task Scheduler | It has a pgAgent task scheduler. | It has a Scheduled event. |
Connection Scalability | Here, every time a connection is created, it is an OS process. | Here, every time a connection is created, it is an OS thread. |
Community Support | It has strong and active community support of developers who continually improves the existing features with access to free resources. | It has broad community support of developers who always maintain existing features with new features. |
Company Uses | Apple, Etsy, IMDB, Macworld, Debian, Red Hat, Sun Microsystem, Cisco, Skype. | GitHub, US Navy, NASA, Tesla, Netflix, Facebook, Twitter, Zappos, YouTube, Spotify. |
以下是使PostgreSQL比MySQL更有利的几点:
以下是使MySQL比PostgreSQL更有利的几点: