as a relational database programmer, my first choice was to use a relational database system to save these xml documents.
作为一名关系数据库程序员,我的首选是使用关系数据库系统保存这些xml文档。
when a relational database system is implemented, three-valued logic is usually adopted to handle incomplete information.
在关系数据库系统的实现中,对不完全信息的处理通常采用三值逻辑。
for example, picture a financial institution that stores data about its customers「 stock portfolios in a relational database system such as mysql, db2, or oracle.