第一范式：字段内容不可分割，可以继续拆分就是不满足第一范式

在项目中违反过第一范式，用过enable_status字段

1：启动，纳入并表
0：表示不启动
-1：启动，退出并表
-9：表示逻辑删除

1和0表示内容是可以拆分的，应该再新建一个字段表示是否纳入并表

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