Relational databases aren't like programming languages. They don't have array types.
关系数据库不同于编程语言，它们不具有数组类型。
2
JPA is a simplified programming model used for object relational mapping and data persistence.
JPA是一个用于对象关系映射以及数据支持的简化程序模型。
3
We further illustrate the simplicity of the programming model promoted by SDOs with examples of access to an XML file service and to a relational database.