学生表(id,name,sex,age,depart_id,depart_name),存在的函数依赖是id→{name,sex,age,depart_id}; dept_id→dept_name,其满足A:1NFB:2NFC:3NFD:BCNF 函数 满足 依赖 发布时间:2024-05-19 14:17:39