Since the responsibility for accessing the physical data rests with the database management system, the programmer can ignore the physical data structure.
由于存取实际数据的责任由数据库系统承担，因此程序员就可以不考虑实际的数据结构。
Since the responsibility for accessing the physical data rests with the database management system, the programmer can ignore the physical data structure.
由于存取实际数据的责任由数据库系统承担，因此程序员就可以不考虑实际的数据结构。
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