Dyntex.net Support Centre: MySQL Reference Manual p.17

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Table of Contents
1. General Information
2. MySQL Installation
3. Tutorial Introduction
4. Database Administration
5. MySQL Optimisation
6. MySQL Language Reference
7. MySQL Table Types
8. MySQL APIs
9. Extending MySQL

Chapter 1: General Information 17 1.4.3.1 Using the MySQL Software Under a Commercial License The GPL license is contagious in the sense that when a program is linked to a GPL program the resulting product must also be released under GPL lest you break the license terms and forfeit your right to use the GPL program altogether. You need a commercial license: When you link a program with code from the MySQL software or from GPL released clients and don't want the resulting product to be GPL, maybe because you want to build a commercial product or keep the added non-GPL code closed source for other reasons. When purchasing commercial licenses, you are not using the MySQL software under GPL even though it's the same code. When you distribute a non-GPL application that only works with the MySQL software and ship it with the MySQL software. This type of solution is actually considered to be linking even if it's done over a network. When you distribute copies of the MySQL software without providing the source code as required under the GPL license. When you want to support the further development of the MySQL database even if you don't formally need a commercial license. Purchasing support directly from MySQL AB is another good way of contributing to the development of the MySQL software, with immediate advantages for you. See Section 1.4.1 [Support], page 15. If you require a license, you will need one for each installation of the MySQL software. This covers any number of CPUs on a machine, and there is no articial limit on the number of clients that connect to the server in any way. To purchase commercial licenses and support, please visit the order section of our web site at https://order.mysql.com/. If you have special licensing needs or you have restricted access to the Internet, please contact our sales sta at sales@mysql.com. 1.4.3.2 Using the MySQL Software for Free Under GPL You can use the MySQL software for free under the GPL: When you link a program with code from the MySQL software and release the resulting product under GPL. When you distribute the MySQL source code bundled with other programs that are not linked to or dependent on MySQL Server for their functionality even if you sell the distribution commercially. When using the MySQL software internally in your company. When you are an Internet Service Provider (ISPs) oering web hosting with MySQL servers for your customers. On the other hand, we do encourage people to use ISPs that have MySQL support, as this will give them the condence that if they have some problem with the MySQL installation, their ISP will in fact have the resources to solve the problem for them.

MySQL Reference Manual

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