题目内容
填空题 The____level of a DBMS interacts directly with the hardware and is concerned with low-level access methods and byte transfer to and from the storage device.
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填空题 The ____level of a DBMS interacts directly with the user.
填空题 In a ____model, the entities are organized in a graph, where some entities can be accessed through several paths.
判断题 A database is a collection of data that is logically, but not necessarily physically, coherent. ( ) 对 ( ) 错
判断题 The external level of a DBMS interacts directly with the hardware and is concerned with low-level access methods and byte transfer to and from the storage device. ( ) 对 ( ) 错
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