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。
Data independence will remain there for sync as it is already for online access.
由于已经为在线访问提供了数据独立性，因此在同步功能中仍然保留这一特性。
Data independence will remain there for sync as it is already for online access.
由于已经为在线访问提供了数据独立性，因此在同步功能中仍然保留这一特性。
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