# 前言和法律條款 這是 MySQL 數據庫系統 v8.0 到 v8.0.18 的參考手冊. Differences between minor versions of MySQL 8.0 are noted in the present text with reference to release numbers (8.0.***x***). 有關許可信息, 參閱[法律條款](#legal-notices). This manual is not intended for use with older versions of the MySQL software due to the many functional and other differences between MySQL 8.0 and previous versions. 如果你使用的是早期版本的 MySQL, 請參閱對應的手冊. 例如, [*MySQL 5.7 參考手冊*](https://dev.mysql.com/doc/refman/5.7/en/) 涵蓋 5.7 系列 MySQL 軟件版本. **許可信息—MySQL 8.0.** 該軟件可能包含經許可使用的第三方軟件. 如果你使用的是 MySQL 8.0 的商業版本, see the [MySQL 8.0 Commercial Release License Information User Manual](https://downloads.mysql.com/docs/licenses/mysqld-8.0-com-en.pdf) for licensing information, including licensing information relating to third-party software that may be included in this Commercial release. 如果你使用的是 MySQL 8.0 的社區版本, see the [MySQL 8.0 Community Release License Information User Manual](https://downloads.mysql.com/docs/licenses/mysqld-8.0-gpl-en.pdf) for licensing information, including licensing information relating to third-party software that may be included in this Community release. **許可信息—MySQL NDB Cluster 8.0.** If you are using a *Community* release of MySQL NDB Cluster 8.0, see the [MySQL NDB Cluster 8.0 Community Release License Information User Manual](https://downloads.mysql.com/docs/licenses/cluster-8.0-gpl-en.pdf) for licensing information, including licensing information relating to third-party software that may be included in this Community release. ## 法律條款 Copyright ? 1997, 2019, Oracle and/or its affiliates. 保留所有權利. 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