[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fM3Ot-AGjdWqCqgMx1WdHKEi47leyHrubyRzPHsc4DAQ":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2024-06-06 16:31:47",149212056,[8,9,10,11],"1NF,第二范式(2NF)","1NF,第三范式(3NF)","2NF,第三范式(3NF)","2NF,BC范式(BCNF)",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},9,"69708f26e75d0dd4fbe7b1080eea8617","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F97eba5265bbc8a449d9ddaa443b457c4.jpg","解密数据管理-数据库原理与应用","work_35560405","作业12.xls","从( )关系中消除了非主属性对主码的部分函数依赖,这指的是( ).(单选题)",[21,33,39,44,49,58,67,76,85],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2024-06-06 16:31:45",149212024,[26,27,28,29],"LEFT OUTER JOIN","RIGHT OUTER JOIN","FULL OUTER JOIN","CROSS JOIN","连接查询可以显示符合条件的数据行以及右边表中不符合条件的数据行.(单选题)","v1",0,{"answer":34,"createTime":35,"id":36,"options":37,"question":38,"source":31,"type":32},[],"2024-06-06 16:31:46",149212029,[8,9,10,11],"如果关系模式属于( ),且每个非主属性都不传递函数依赖于关系的主码,这指的是( ).(单选题)",{"answer":40,"createTime":35,"id":41,"options":42,"question":43,"source":31,"type":32},[],149212032,[26,27,28,29],"连接查询可以显示符合条件的数据行以及左边表中不符合条件的数据行.(单选题)",{"answer":45,"createTime":35,"id":46,"options":47,"question":48,"source":31,"type":32},[],149212035,[26,27,28,29],"连接查询是将一个表的每一个记录和另一表的每个记匹配成新的数据行.(单选题)",{"answer":50,"createTime":35,"id":51,"options":52,"question":57,"source":31,"type":32},[],149212038,[53,54,55,56],"JOIN…ON…","JOIN…BY…","ON…JOIN…","BY…JOIN…","要进行多表连接查询时,可以使用( )语句.(单选题)",{"answer":59,"createTime":35,"id":60,"options":61,"question":66,"source":31,"type":32},[],149212043,[62,63,64,65],"第一范式(1NF)","第二范式(2NF)","第三范式(3NF)","BC范式(BCNF)","关系中每个属性都是不可再分的原子项,这指的是().(单选题)",{"answer":68,"createTime":35,"id":69,"options":70,"question":75,"source":31,"type":32},[],149212048,[71,72,73,74],"FROM 多表名 SELECT 连接条件","TABLE 多表名 WHERE 连接条件","TABLE 多表名 FROM 连接条件","FROM 多表名 WHERE 连接条件","不使用JOIN子句进行连接查询时,可以使用( )的方式.(单选题)",{"answer":77,"createTime":5,"id":78,"options":79,"question":84,"source":31,"type":32},[],149212052,[80,81,82,83],"多重查询","嵌套查询","连接查询","多目的查询","如果一个查询需要对我多个表进行操作,就称为( ).(单选题)",{"answer":86,"createTime":5,"id":6,"options":87,"question":19,"source":31,"type":32},[],[8,9,10,11]]