11、在数据库的三级模式结构中，内模式有（）。 A. 1个 B. 2个 C. 3个 D. 任意多个 - 查题网

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河南成教 / 数据库应用

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11、

在数据库的三级模式结构中，内模式有（）。

A. 1个

B. 2个

C. 3个

D. 任意多个

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数据库应用

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