Home Database Mysql Tutorial MySQL学习系列之数据库概述

MySQL学习系列之数据库概述

Jun 07, 2016 pm 04:52 PM

MySQL是最流行的开放源码SQL数据库管理系统,它是由MySQL AB公司开发、发布并支持的。MySQL AB是由多名MySQL开发人创办的一家商业

    资料来源:mysql5.1中文手册

    MySQL是最流行的开放源码SQL数据库管理系统,它是由MySQL AB公司开发、发布并支持的。MySQL AB是由多名MySQL开发人创办的一家商业公司。它是一家第二代开放源码公司,结合了开放源码价值取向、方法和成功的商业模型。

    在MySQL的网站()上,给出了关于MySQL和MySQL的最新信息。

1)MySQL是一种数据库管理系统。

    数据库是数据的结构化集合。它可以是任何东西,从简单的购物清单到画展,或企业网络中的海量信息。要想将数据添加到数据库,或访问、处理计算机数据库中保存的数据,需要使用数据库管理系统,如MySQL服务器。计算机是处理大量数据的理想工具,因此,数据库管理系统在计算方面扮演着关键的中心角色,或是作为独立的实用工具,或是作为其他应用程序的组成部分。

2)MySQL是一种关联数据库管理系统。

    关联数据库将数据保存在不同的表中,而不是将所有数据放在一个大的仓库内。这样就增加了速度并提高了灵活性。MySQL的SQL指得是“结构化查询语言”。SQL是用于访问数据库的最常用标准化语言,它是由ANSI/ISO SQL标准定义的。SQL标准自1986年以来不断演化发展,有数种版本。在本手册中,“SQL-92”指得是1992年发布的标准,“SQL:1999”指得是1999年发布的标准,“SQL:2003”指得是标准的当前版本。我们采用术语“SQL标准”标示SQL标准的当前版本。

3)MySQL软件是一种开放源码软件。

    “开放源码”意味着任何人都能使用和改变软件。任何人都能从Internet下载MySQL软件,而无需支付任何费用。如果愿意,你可以研究源码并进行恰当的更改,以满足你自己的需求。MySQL软件采用了GPL(GNU通用公共许可证),,定义了在不同情况下可以用软件作的事和不可作的事。如果你对GPL不满意,或需要在商业应用程序中嵌入MySQL代码,可从我方购买商业许可版本。更多信息,请参见MySQL许可概述()。

4)MySQL数据库服务器具有快速、可靠和易于使用的特点。

    如果它正是你所寻找的,不妨一试。MySQL服务器还有一套实用的特性集合,这些特性是通过与我们用户的密切合作而开发的。在我们的基准测试主页上,给出了MySQL服务器和其他数据库管理器的比较结果。

MySQL服务器最初是为处理大型数据库而开发的,与已有的解决方案相比,它的速度更快,多年以来,它已成功用于众多要求很高的生产环境。尽管MySQL始终在不断发展,但目前MySQL服务器已能提供丰富和有用的功能。它具有良好的连通性、速度和安全性,这使的MySQL十分适合于访问Internet上的数据库。

5)MySQL服务器工作在客户端/服务器模式下,或嵌入式系统中。

    MySQL数据库软件是一种客户端/服务器系统,由支持不同后端的1个多线程SQL服务器,数种不同的客户端程序和库,众多管理工具和广泛的应用编程接口API组成。

我们还能以嵌入式多线程库的形式提供MySQL服务器,你可以将其链接到你的应用程序,从而获得更小、更快、和更易管理的产品。

6)有大量可用的共享MySQL软件。

    你所喜欢的应用程序和语言均支持MySQL数据库服务器,这种情况十分可能。

“MySQL”的正式发音是“My Ess Que Ell”(而不是“my sequel”),但我们并不介意你的发音方式是“my sequel”或其他当地方式。

1.4.1. MySQL的历史

    我们最初的出发点是,使用mSQL来连接我们的表,这类表采用了我们的快速低层面(ISAM)子程序。然而,经过一些测试后,我们得出结论,mSQL的速度或灵活性不足以满足我们的要求。其结果是,为我们的数据库提供了新的SQL接口,,但API接口与mSQL的几乎一样。设计该API的目的在于,允许将为mSQL编写的第三方代码方便地移植到MySQL。

MySQL名称的起源不明。10多年来,我们的基本目录以及大量库和工具均采用了前缀“my”。不过,共同创办人Monty Widenius的女儿名字也叫“My”。时至今日,MySQL名称的起源仍是一个迷,即使对我们也一样。

     MySQL Dolphin(我方徽标)的名称为“Sakila”,它是由MySQL AB公司的创办人从用户在“Dolphin命名”比赛中提供的众多建议中选定的。该名称是由来自非洲斯威士兰的开放源码软件开发人Ambrose Twebaze提出的。根据Ambrose的说法,按斯威士兰的本地语言,女性化名称Sakila源自SiSwati。Sakila也是坦桑尼亚、Arusha地区的一个镇的镇名,靠近Ambrose的母国乌干达。

linux

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Roblox: Bubble Gum Simulator Infinity - How To Get And Use Royal Keys
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Nordhold: Fusion System, Explained
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Java Tutorial
1664
14
PHP Tutorial
1269
29
C# Tutorial
1248
24
MySQL's Role: Databases in Web Applications MySQL's Role: Databases in Web Applications Apr 17, 2025 am 12:23 AM

The main role of MySQL in web applications is to store and manage data. 1.MySQL efficiently processes user information, product catalogs, transaction records and other data. 2. Through SQL query, developers can extract information from the database to generate dynamic content. 3.MySQL works based on the client-server model to ensure acceptable query speed.

Explain the role of InnoDB redo logs and undo logs. Explain the role of InnoDB redo logs and undo logs. Apr 15, 2025 am 12:16 AM

InnoDB uses redologs and undologs to ensure data consistency and reliability. 1.redologs record data page modification to ensure crash recovery and transaction persistence. 2.undologs records the original data value and supports transaction rollback and MVCC.

MySQL: An Introduction to the World's Most Popular Database MySQL: An Introduction to the World's Most Popular Database Apr 12, 2025 am 12:18 AM

MySQL is an open source relational database management system, mainly used to store and retrieve data quickly and reliably. Its working principle includes client requests, query resolution, execution of queries and return results. Examples of usage include creating tables, inserting and querying data, and advanced features such as JOIN operations. Common errors involve SQL syntax, data types, and permissions, and optimization suggestions include the use of indexes, optimized queries, and partitioning of tables.

MySQL's Place: Databases and Programming MySQL's Place: Databases and Programming Apr 13, 2025 am 12:18 AM

MySQL's position in databases and programming is very important. It is an open source relational database management system that is widely used in various application scenarios. 1) MySQL provides efficient data storage, organization and retrieval functions, supporting Web, mobile and enterprise-level systems. 2) It uses a client-server architecture, supports multiple storage engines and index optimization. 3) Basic usages include creating tables and inserting data, and advanced usages involve multi-table JOINs and complex queries. 4) Frequently asked questions such as SQL syntax errors and performance issues can be debugged through the EXPLAIN command and slow query log. 5) Performance optimization methods include rational use of indexes, optimized query and use of caches. Best practices include using transactions and PreparedStatemen

Why Use MySQL? Benefits and Advantages Why Use MySQL? Benefits and Advantages Apr 12, 2025 am 12:17 AM

MySQL is chosen for its performance, reliability, ease of use, and community support. 1.MySQL provides efficient data storage and retrieval functions, supporting multiple data types and advanced query operations. 2. Adopt client-server architecture and multiple storage engines to support transaction and query optimization. 3. Easy to use, supports a variety of operating systems and programming languages. 4. Have strong community support and provide rich resources and solutions.

MySQL vs. Other Programming Languages: A Comparison MySQL vs. Other Programming Languages: A Comparison Apr 19, 2025 am 12:22 AM

Compared with other programming languages, MySQL is mainly used to store and manage data, while other languages ​​such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages ​​have advantages in their respective fields such as data analytics, enterprise applications, and system programming.

How does MySQL index cardinality affect query performance? How does MySQL index cardinality affect query performance? Apr 14, 2025 am 12:18 AM

MySQL index cardinality has a significant impact on query performance: 1. High cardinality index can more effectively narrow the data range and improve query efficiency; 2. Low cardinality index may lead to full table scanning and reduce query performance; 3. In joint index, high cardinality sequences should be placed in front to optimize query.

MySQL: From Small Businesses to Large Enterprises MySQL: From Small Businesses to Large Enterprises Apr 13, 2025 am 12:17 AM

MySQL is suitable for small and large enterprises. 1) Small businesses can use MySQL for basic data management, such as storing customer information. 2) Large enterprises can use MySQL to process massive data and complex business logic to optimize query performance and transaction processing.

See all articles