[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fSdRETgdsS0awOc1t6stnEjC1TGGnWPA3jP4s7uK1QuU":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":11,"question":15,"related":16,"source":26,"type":27},[],"2023-12-28 01:09:30",123071577,[8,9,10],"备份异常、恢复异常、概念异常、逻辑异常","建库异常、建表异常、数据异常、逻辑异常","数据冗余、插入异常、删除异常、更新异常B.插入异常、删除异常、更新异常、查询异常",{"courseId":12,"courseImg":13,"courseName":14},"bc0ffb9a9c5a7ba59289e272c683e12e","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7e2d5ad53be3d12aacc56ee37db405b7.jpg","数据库原理","一个没有设计好的关系模式可能存在( )",[17,28,37,46,55,64,73,81,90,99],{"answer":18,"createTime":5,"id":19,"options":20,"question":25,"source":26,"type":27},[],123071561,[21,22,23,24],"CREATE VIEW","CREATE INDEX","CREATE DATABASE","CREATE TABLE","在SQL中使用( )命令建立基本表","v1",0,{"answer":29,"createTime":5,"id":30,"options":31,"question":36,"source":26,"type":27},[],123071564,[32,33,34,35],"主键","外键","属性","联系","实体的完整性是指在建立数据表时,( )不能为空",{"answer":38,"createTime":5,"id":39,"options":40,"question":45,"source":26,"type":27},[],123071565,[41,42,43,44],"子模式\u002F模式映象 ;模式\u002F概念模式映象","外模式\u002F模式映象 ;外模式\u002F内模式映象","逻辑模式\u002F模式映象 ;概念模式\u002F模式映象","外模式\u002F模式映象 ;模式\u002F内模式映象","数据库的三级模式间存在两种映像,他们是( )和( )",{"answer":47,"createTime":5,"id":48,"options":49,"question":54,"source":26,"type":27},[],123071566,[50,51,52,53],"4","7","6","1","学生信息表的关系模式为学生信息表(学号,姓名,性别,生日,电话,家庭住址),则它包括( )个属性",{"answer":56,"createTime":5,"id":57,"options":58,"question":63,"source":26,"type":27},[],123071567,[59,60,61,62],"编译语言","非结构化语言","结构化查询语言","自动控制语言","SQL 语言通常称为( )",{"answer":65,"createTime":5,"id":66,"options":67,"question":72,"source":26,"type":27},[],123071570,[68,69,70,71],"内模式;核心模式;子模式","概念模式;逻辑模式;物理模式","内模式 ;概念模式 ;外模式","数据模式;概念模式;物理模式","数据库的体系结构分为 、 和 三级.横线处填入( )",{"answer":74,"createTime":5,"id":75,"options":76,"question":80,"source":26,"type":27},[],123071571,[77,22,78,79],"WITH CHECK OPTION","ORDER BY","GROUP BY","当对视图进行 UPDATE、INSERT和DELETE 操作时,为了保证被操作的行满足视图定义中子查询语句的谓词条件,应在视图定义语句中使用可选择项( )",{"answer":82,"createTime":5,"id":83,"options":84,"question":89,"source":26,"type":27},[],123071572,[85,86,87,88],"一致性、可恢复性、完整性、安全性","完整性、安全性、原子性、隔离性","原子性、完整性、安全性、永久性","原子性、一致性、隔离性、持久性","事务的特性有( )",{"answer":91,"createTime":5,"id":92,"options":93,"question":98,"source":26,"type":27},[],123071574,[94,95,96,97],"STUNO","TELEPHONE","SNAME","AGE","关系模式如:STU(STUNO,SNAME,AGE,TELEPHONE),其中,( )为主键",{"answer":100,"createTime":5,"id":6,"options":101,"question":15,"source":26,"type":27},[],[8,9,10]]