DB2的优化器是完成该物理数据独立性的组件。

DB2's optimizer is the component that accomplishes this physical data independence.

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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.

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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.

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