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主键

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boke35

#1 Created at ... [Delete] [Delete and Lock User]

那学号就是用来当主键的咯

廖雪峰

#2 Created at ... [Delete] [Delete and Lock User]

主键不要带有业务含义

寒寒爱酸奶

#3 Created at ... [Delete] [Delete and Lock User]

正解，一定不要带有业务考量的字段

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