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在DDBS中，必须从分片能通过操作得到全局关系，这个性质称为（）
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在DDBS中，必须从分片能通过操作得到全局关系，这个性质称为（）
A、映射条件
B、完备性条件
C、重构条件
D、不相交条件
时间：2021-12-22 16:06
关键词：
网络与数据库
中级数据库系统工程师
CMS专题
计算机软件水平考试
答案解析
C
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