[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fd6BBD0PRNxyokTChCM0R-jF9jnBd3dn0YWlqd421s5o":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-10-26 00:20:44",101590734,[8,9,10,11],"系统自动为该字段设置查阅列表","系统自动为该字段设置自动编号","系统自动为该字段建立索引","系统自动为该字段设置数据类型",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},38,"267a7b28ef41dd383aa7d96fc8dd47a1","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa17735133d46e0922b594583650e9135.jpg","数据库Access2010","1967a1f80d384b1eb0cad556f1297e43","C5.定义主键\u002F自动编号","如果将某个字段设置为主键,则( )",[21,32,41,50,59,67,70,77,86,91],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],101590713,[25,26,27,28],"3","2","4","1","每个数据表可包含的自动编号型字段的个数为( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],101590716,[36,37,38,39],"日期\u002F时间","自动编号","文本","数字","Access中,不能编辑的字段类型是( )",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],101590719,[45,46,47,48],"整型","字节","单精度型","长整形","Access中,自动编号类型的字段,其字段大小可以是( )",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],101590725,[54,55,56,57],"主关键字只能是单一的字段","一个表可以设置多个主关键字","作为主关键字的字段,它的数据能够重复","主关键字段中不许有重复值和空值","Access中,关于主关键字(即主键)的说法正确的是( )",{"answer":60,"createTime":5,"id":61,"options":62,"question":66,"source":30,"type":31},[],101590730,[37,63,64,65],"单字段","OLE对象","多字段","Access的表中,下列不可以定义为主键的是( )",{"answer":68,"createTime":5,"id":6,"options":69,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":71,"createTime":5,"id":72,"options":73,"question":76,"source":30,"type":31},[],101590737,[64,74,75,37],"一个字段","多个字段组合","在Access数据表中,不能定义为主键的是( )",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":30,"type":31},[],101590740,[81,82,83,84],"主关键字","数据项","字段","表","在学生管理数据库中唯一区分两个学生的记录是( )",{"answer":87,"createTime":5,"id":88,"options":89,"question":90,"source":30,"type":31},[],101590744,[37,64,63,65],"Access的表中,( )不可以定义为主键",{"answer":92,"createTime":5,"id":93,"options":94,"question":99,"source":30,"type":31},[],101590746,[95,96,97,98],"Access并不要求在每一个表中都必须包含一个主键","在输入数据或对数据进行修改时,不能向主键的字段输入相同的值","利用主键可以加快数据的查找速度","在一个表中只能指定一个字段为主键","关于主键,下列说法错误的是( )"]