题目内容
In a database, ( ) is a separate entity from the software that accesses it.
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The ( ) is the physical computer system that allows access to data.
A distributed database can be classified either as a [填空1] distributed database or as a [填空2] distributed database. Of the two databases, [填空3] is more secure than the other one.
There are three levels in the DBMS architecture. Among them, [填空1] level is to interact with users directly, [填空2] level is to interact with hardware directly, and query is on [填空3] level.
Before the emergence of databases, what was the traditional way of data storage?
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