[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fnD0_RQRpkRvSOMXjY8cWtPdrFZlY2f9EQqrWp30UlM4":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":18,"related":19,"source":29,"type":30},[],"2023-05-11 00:15:26",969370870,[8,9,10,11],"Select * From Emp Where Comm Is Not NULL","Select * From Emp Where Comm <> NULL","Select * From Emp Where Comm== NULL","Select * From Emp Where Comm = NULL",{"courseId":13,"courseImg":14,"courseName":15,"workId":16,"workName":17},"1000006997","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6be5ba294fe462231fc51aca759436d5.jpg","数据库应用技术","55300925","数据库应用技术教程考试","数据库中有一张表名为Emp,包含有如下列:EmpNO(雇员编号,Varchar(20),Pk),Job(职位Varchar(10)),HirDate(雇佣日期,Date),Sal(月薪,Float),Comm(奖金,Float,可为空).查询出所有领取奖金的雇员信息",[20,31,40,49,58,67,75,78,83,88],{"answer":21,"createTime":5,"id":22,"options":23,"question":28,"source":29,"type":30},[],969370834,[24,25,26,27],"SQL Server每次重启时,都重新创建model数据库","每次启动数据库引擎时,model数据库的大小都会被重置","model数据库用作在系统上创建的所有数据库的模板","model数据库是系统数据库,因此不能向该数据库中添加表","在SQL Server 2014数据库系统中,下列关于model数据库的说法正确的是( )","v2",0,{"answer":32,"createTime":5,"id":33,"options":34,"question":39,"source":29,"type":30},[],969370840,[35,36,37,38],"IN (40,50)","BETWEEN 40 AND 50","BETWEEN 40 OR 50","BETWEEN 40 ,50","SQL语言中,条件表示年龄在40至50之间的表达式为 ( )",{"answer":41,"createTime":5,"id":42,"options":43,"question":48,"source":29,"type":30},[],969370851,[44,45,46,47],"发行日期","支持的操作系统","性能差异","支持的语言","SQL Server标准版和企业版的最大差别在( )",{"answer":50,"createTime":5,"id":51,"options":52,"question":57,"source":29,"type":30},[],969370855,[53,54,55,56],"域","实体","参照","ABC都可以","主键约束用来强制数据的( )完整性",{"answer":59,"createTime":5,"id":60,"options":61,"question":66,"source":29,"type":30},[],969370856,[62,63,64,65],"为"级别"字段建立default约束","为"级别"字段建立check约束","在教师表上建立一个触发器","为教师表插入数据编写一个存储过程进行控制","要建立一张教师表,包括姓名,职称,级别等字段,插入数据时,如果不输入级别字段,缺省值为"讲师",最适合的实现方式是()",{"answer":68,"createTime":5,"id":69,"options":70,"question":73,"source":29,"type":74},[],969370861,[71,72],"对","错","在SQLServer2014中,我们创建数据库的语句是CREATE DB",3,{"answer":76,"createTime":5,"id":6,"options":77,"question":18,"source":29,"type":30},[],[8,9,10,11],{"answer":79,"createTime":5,"id":80,"options":81,"question":82,"source":29,"type":74},[],969370872,[71,72],"对操作系统定期升级有助于保护SQL Server的安全",{"answer":84,"createTime":5,"id":85,"options":86,"question":87,"source":29,"type":74},[],969370874,[71,72],"创建数据库可以用对象资源管理器完成",{"answer":89,"createTime":5,"id":90,"options":91,"question":92,"source":29,"type":74},[],969370905,[71,72],"数据库被分离后,数据文件还在,被分离的数据文件能被重新附加到其它的SQLServer2014实例上"]