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关于数据库的问题,唯一和非重复的概念
2022-07-17 03:15:00 【CSDN问答】
数据库中某一列,唯一值4个和非重复值有55个,请问一下,这代表什么意思,唯一和非重复,概念上有啥区别呢?
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