Home Database Mysql Tutorial 学习使用数据库MySQL_MySQL

学习使用数据库MySQL_MySQL

Jun 01, 2016 pm 01:55 PM
it industry linux yes

MySQL是一个遵循GPL的开源软件、在Linux平台底下它是LAMP(LAMP 在英语中是“灯”的意思,但是在 IT 行业当然不是那么简单的一个意思了。这个术语在德国十分流行。代表了 Linux 平台上的 Apache 网站服务器;MySQL 数据库以及 Perl 、Python 或者 PHP 编程语言的结合)组合重要组成部分。同时它提供的C API可以结合Glade/GTK+,可以代替Windows平台的VB+ACCESS/MS SQL SERVER组合。本篇文章介绍数据库MySQL及其各种工具的简单用法.

一、为什么使用MySQL:MySQL是一种高性能的数据库,因为如下原因。它可以和市场下任何同类的产品竞争。

1   速度。MySQL本身并不复杂。http://www.mysql.com/information/crash-me.php上可以找到MySQL和其他数据库产品进行竞争的数据的相关信息

2  可升级性。MySQL能够同时处理无限数量的拥护和5亿个纪录

3   简单性。MySQL的核心是一个小而快速的数据库,面向那些了解数据库工作的人员,是他们能够有效的工作和编写高级功能。

4   价值:MySQL是遵循GPL协议的自由软件,你可以下载并且使用它。

5  可移植性。因为MySQL是开放源代码的自由软件,可以运行于所有的平台,如果不能运行于你的平台,你可以修改、编译源代码。

二、MySQL缺少什么

  MySQL所保护的都是基于权限的,不是基于市场的。MySQL能做什么和不能做什么是我们在使用之前需要清楚的。

1   图形界面:MySQL开始提供类似MS SQL Server的界面,尚处于测试中

2   事务处理:MySQL不支持事务处理,但是2000年5月9日的发行说明中,MySQL宣称版本3.23.15“试验性支持”Sleepy Software的Berkely DB数据库。版本3.23.25完全实现了这一个功能。

3   存储过程:MySQL没有存储过程机制。MySQL开发团体的“to do”列表中有一种存储过程机制,它将包含在版本4中。

4    触发器:触发器是一种程序,通常存在于一种嵌入式脚本语言如Zend或者Python中。有消息说这种触发器会应用于版本4中,使用Zend脚本引擎。

5   参照完整性:将来支持

6   记录等级锁定:MySQL不支持记录等级锁定。将来会改善,这都是开放源代码的力量。

7   子查询:MySQL不支持子查询。但是通过它提供的C语言接口可以很容易的弥补。

8   视图:MySQL不支持视图。但是它在MySQL开发团体的to do列表中。

很清楚地看到MySQL对于转向Linux的平台应用的将来的意义。

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