The Apache Derby database provides a nearly complete implementation of the SQL-92 standard, so applications developed with Derby can be easily transported to other database systems.
Apache Derby 数据库为 SQL-92 标准提供了几乎完整的实现，所以用 Deryby 开发的应用程序可以容易地移植到其他数据库系统。
The previous researches on spatiotemporal databases were concentrated on data models and languages, they are not the implementation of spatiotemporal database systems.
已有的时空数据库研究集中在模型和语言上，缺乏时空数据库的系统实现。
Then the security information management model in the SKJ2004 project is taken as an example to describe the implementation process of heterogeneous distributed database systems based on CORBA.
并以正在研发的数字矿井项目中的安全信息管理模块为例，介绍了基于CORBA的异构分布式数据库系统的实现方法。
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