DB2's optimizer is the component that accomplishes this physical data independence.
DB2的优化器是完成该物理数据独立性的组件。
This separation of access criteria from physical storage characteristics is called physical data independence.
从物理存储特征中分离出访问标准叫作物理数据独立性。
In order to keep the data independence from application program, the necessary local logical data structure can be self-defined in every individual application program.
为了实现数据对应用程序的独立性，应用程序自行定义所需要的局部逻辑数据结构。
In order to keep the data independence from application program, the necessary local logical data structure can be self-defined in every individual application program.
为了实现数据对应用程序的独立性，应用程序自行定义所需要的局部逻辑数据结构。
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