[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fFaJs02dZCsb2Y1eqMJFemMuIDpWeLTv9LO4r-zeAq3o":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":28,"type":29},[],"2023-10-15 19:23:21",100037182,[8,9,10,11],"封锁","恢复","存取控制","协商",{"courseId":13,"courseImg":14,"courseName":15},"aebed2d79a08520e2bb42816d18b5d56","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0d27132e8e4c25614916fe2373258c2e.jpg","数据库技术","解决并发操作带来的数据不一致性总是普遍采用( )",[18,30,39,48,57,66,75,84,93,102],{"answer":19,"createTime":20,"id":21,"options":22,"question":27,"source":28,"type":29},[],"2023-10-15 19:23:20",100037151,[23,24,25,26],"1对1","1对多","多对多","多对1","如果规定:一个学校只有一个校长,一个校长只在一个学校任职,则实体集学校和校长之间的联系是( )","v1",0,{"answer":31,"createTime":20,"id":32,"options":33,"question":38,"source":28,"type":29},[],100037152,[34,35,36,37],"第3条记录上","第4条记录上","第5条记录上","第6条记录上","假定STUDENT.DBF学生数据库文件中装入前六条记录均为男生的记录,执行以下命令序列USE STUDENTGOTO 3LOCATE NEXT 3 FOR 性别="男"后,记录指针定位在( )",{"answer":40,"createTime":20,"id":41,"options":42,"question":47,"source":28,"type":29},[],100037153,[43,44,45,46],"逻辑模型","概念模型","物理模型","数据模型","可以用E-R图描述的是( )",{"answer":49,"createTime":20,"id":50,"options":51,"question":56,"source":28,"type":29},[],100037154,[52,53,54,55],"4.700","4.790","4.800","4.796","ROUND(4.785,2)返回的是( )",{"answer":58,"createTime":20,"id":59,"options":60,"question":65,"source":28,"type":29},[],100037155,[61,62,63,64],"1998","98","981220","1220","假定系统日期是1998年12月20日,有如下命令NJ=MOD(YEAR(DATE())-1900,100)执命令后,NJ的值是( )",{"answer":67,"createTime":20,"id":68,"options":69,"question":74,"source":28,"type":29},[],100037156,[70,71,72,73],"层次模型","网状模型","关系模型","联系模型","使用二维表格结构表达实体及实体间联系的数据模型是( )",{"answer":76,"createTime":20,"id":77,"options":78,"question":83,"source":28,"type":29},[],100037158,[79,80,81,82],"提高运行速度","降低网络通信量","间接实现安全控制","存储在DB之外方便修改","存储过程的优点不包括( )",{"answer":85,"createTime":20,"id":86,"options":87,"question":92,"source":28,"type":29},[],100037159,[88,89,90,91],"导出表即为视图","导出表是执行了查询时产生的表","导出表必然与原表具有同样结构","导出表可以用CREATETABLE直接创建","下列关于导出表叙述正确的是( )",{"answer":94,"createTime":5,"id":95,"options":96,"question":101,"source":28,"type":29},[],100037160,[97,98,99,100],"insert","create","drop table","update","数据库中增加一条新数据使用的命令是( )",{"answer":103,"createTime":5,"id":104,"options":105,"question":110,"source":28,"type":29},[],100037161,[106,107,108,109],"索引码","关键字","域","排序码","在一个关系中,能够唯一确定一个元组的属性或属性组合叫做( )"]