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学生关系中的院系号属性与院系关系中的院系号主码属性相对应,则()属性为()关系中的外码。
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学生关系中的院系号属性与院系关系中的院系号主码属性相对应,则()属性为()关系中的外码。
时间:2022-01-07 09:32
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国家开放大学(数据库基础与应用)
CMS专题
专科
计算机信息管理
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院系号;学生
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