[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fZvlBjrGE_Lpo_t20uT2Igl4T-c66Z1EqUoGd_m4gIQI":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":17,"related":18,"source":30,"type":48},[],"2023-05-11 20:20:39",6179250,[8,9],"正确","错误",{"count":11,"courseId":12,"courseImg":13,"courseName":14,"workId":15,"workName":16},17,"6090aff608be9590e62bf5a544f3b5a4","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F67ca3a49a1bacfb811f2a6f8479e8a55.png","数据库原理及应用","d9ef0cf6645c4f68adbbe440b924b0be","4.1 规范化——函数依赖、码","函数依赖不是指关系模式R的所有关系实例均要满足的约束条件,而是指R的某个或某些关系实例满足的约束条件",[19,32,39,45,49,58,65,71,76,81],{"answer":20,"createTime":21,"id":22,"options":23,"question":29,"source":30,"type":31},[],"2023-05-10 20:19:19",4634927,[24,25,26,27,28],"关系名","属性","属性所来自的域","属性到域的映射","U上的数据依赖","关系模式有五部分组成R(U,D,DOM,F),其中D是指( ),DOM是指( )","v1",1,{"answer":33,"createTime":34,"id":35,"options":36,"question":37,"source":30,"type":38},[],"2026-04-30 07:42:09",6179248,[],"数据依赖分为哪两类 和",2,{"answer":40,"createTime":41,"id":42,"options":43,"question":44,"source":30,"type":38},[],"2025-06-08 19:45:12",6179249,[],"若X&rarr;Y,则X称为这个函数依赖的",{"answer":46,"createTime":5,"id":6,"options":47,"question":17,"source":30,"type":48},[],[8,9],3,{"answer":50,"createTime":51,"id":52,"options":53,"question":56,"source":30,"type":57},[],"2024-06-04 22:19:04",6179251,[54,55],"非平凡的函数依赖","平凡的函数依赖","X&rarr;Y,但Y⊈X则称X&rarr;Y是( )X&rarr;Y,但Y&sube;X则称X&rarr;Y是( )",13,{"answer":59,"createTime":51,"id":60,"options":61,"question":64,"source":30,"type":57},[],6179252,[62,63],"X&larr;&rarr;Y","X↛Y","若X&rarr;Y,Y&rarr;X,则记作( )若Y不函数依赖于X,则记作( )",{"answer":66,"createTime":34,"id":67,"options":68,"question":69,"source":30,"type":70},[],355066097,[],"简述函数依赖的定义",4,{"answer":72,"createTime":34,"id":73,"options":74,"question":75,"source":30,"type":70},[],355066098,[],"简述完全函数依赖",{"answer":77,"createTime":34,"id":78,"options":79,"question":80,"source":30,"type":70},[],355066099,[],"简述部分函数依赖",{"answer":82,"createTime":34,"id":83,"options":84,"question":85,"source":30,"type":70},[],355066100,[],"简述传递函数依赖"]