Moxa Technologies 331 User Manual download pdf (Page 4)

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1. Introduce MySQL

MySQL, the most popular Open Source SQL database management system, is developed, distributed, and

supported by MySQL AB. MySQL AB is a commercial company, founded by the MySQL developers. It is a

second generation Open Source company that unites Open Source values and methodology with a

successful business model.

The MySQL Web site (http://www.mysql.com/) provides the latest information about MySQL software and

MySQL AB.

• MySQL is a database management system.

A database is a structured collection of data. It may be anything from a simple shopping list to a picture gallery or the vast

amounts of information in a corporate network. To add, access, and process data stored in a computer database, you need

a database management system such as MySQL Server. Since computers are very good at handling large amounts of data,

database management systems play a central role in computing, as standalone utilities or as parts of other applications.

• MySQL is a relational database management system.

A relational database stores data in separate tables rather than putting all the data in one big storeroom. This adds speed

and flexibility. The SQL part of “MySQL” stands for “Structured Query Language.” SQL is the most common

standardized language used to access databases and is defined by the ANSI/ISO SQL Standard. The SQL standard has

been evolving since 1986 and several versions exist. In this manual, “SQL-92” refers to the standard released in 1992,

“SQL:1999” refers to the standard released in 1999, and “SQL:2003” refers to the current version of the standard.

We use the phrase “the SQL standard” to mean the current version of the SQL Standard at any time.

• MySQL software is Open Source.

Open Source means that it is possible for anyone to use and modify the software. Anybody can download the MySQL

software from the Internet and use it without paying anything. If you wish, you may study the source code and change it

to suit your needs. The MySQL software uses the GPL (GNU General Public License), http://www.fsf.org/licenses/, to

define what you may and may not do with the software in different situations. If you feel uncomfortable with the GPL or

need to embed MySQL code into a commercial application, you can buy a commercially licensed version from us. See the

MySQL Licensing Overview for more information (http://www.mysql.com/company/legal/licensing/).

• The MySQL Database Server is very fast, reliable, and easy to use.

If that is what you are looking for, you should give it a try. MySQL Server also has a practical set of features developed

in close cooperation with our users. You can find a performance comparison of MySQL Server with other database

managers on our benchmark page. See Section 7.1.4, “The MySQL Benchmark Suite”.

MySQL Server was originally developed to handle large databases much faster than existing solutions and has been

successfully used in highly demanding production environments for several years. Although under constant development,

MySQL Server today offers a rich and useful set of functions. Its connectivity, speed, and security make MySQL Server

highly suited for accessing databases on the Internet.

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Moxa Technologies 331 User Manual Page 4