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。
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。
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