[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fVSSrG7jaGnY8_Slg-jL0P_nPSdPGg4D99yZFH787U8A":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2024-06-11 15:10:45",150303328,[8,9,10,11],"select count(*) from user","select count(1) from user","select count(id) from user","select count(username) from user",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},15,"1b898f7c77fb26fa25c3f0ba9bf084d4","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F25b30343053994e8940089572d36015b.jpg","数据库技术与应用","work_34778742","第五章——单元习题","用户表user有多列,其中字段id中没有null值,字段username中存在null值,以下SQL语句不能获得user表的总记录数的是那一个?( )",[21,33,43,52,61,70,79,88,91,100],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2024-06-11 15:08:44",150303321,[26,27,28,29],"age &lt;= 22 AND age &gt;= 20","age = 20 OR age = 22","age &lt; 22 AND age &gt; 20","age = 20 AND age = 22","SQL中,&quot;age IN (20, 22)&quot;的语义是( )","v1",0,{"answer":34,"createTime":35,"id":36,"options":37,"question":42,"source":31,"type":32},[],"2024-06-11 15:08:45",150303322,[38,39,40,41],"group by","order by","desc","distinct","在select语句中,如果要过滤结果集中的重复行,可以在字段列表前面加上( )",{"answer":44,"createTime":5,"id":45,"options":46,"question":51,"source":31,"type":32},[],150303323,[47,48,49,50],"WHERE sName != NULL","WHERE sName ! NULL","WHERE sName IS NOT NULL","WHERE sName NOT NULL","查找条件为:姓名sName不是NULL的记录( )",{"answer":53,"createTime":5,"id":54,"options":55,"question":60,"source":31,"type":32},[],150303324,[56,57,58,59],"第3~4条记录","第2~4条记录","第3~6条记录","第2~5条记录","LIMIT 2,4表示的是( )",{"answer":62,"createTime":5,"id":63,"options":64,"question":69,"source":31,"type":32},[],150303325,[65,66,67,68],"SELECT sNo FROM SC ORDER BY sNo HAVING COUNT(*)&gt; 3","SELECT sNo FROM SC GROUP BY sNo WHERE COUNT(*)&gt; 3","SELECT sNo FROM SC ORDER BY sNo WHERE COUNT(*)&gt; 3","SELECT sNo FROM SC GROUP BY sNo HAVING COUNT(*)&gt; 3","若要求&quot;查询选修了3门以上课程的学生的学号&quot;,正确的SQL语句是( )",{"answer":71,"createTime":5,"id":72,"options":73,"question":78,"source":31,"type":32},[],150303326,[74,75,76,77],"包括20岁和30岁","不包括20岁包括30岁","包括20岁不包括30岁","不包括20岁和30岁","条件&quot;BETWEEN 20 AND 30&quot;表示年龄在20到30之间,且( )",{"answer":80,"createTime":5,"id":81,"options":82,"question":87,"source":31,"type":32},[],150303327,[83,84,85,86],"Order By 工资 Asc","Order By 工资 Desc","Order By 工资 Dictinct","Order By 工资","查询员工工资信息时,结果按工资降序排列,正确的是( )",{"answer":89,"createTime":5,"id":6,"options":90,"question":19,"source":31,"type":32},[],[8,9,10,11],{"answer":92,"createTime":5,"id":93,"options":94,"question":99,"source":31,"type":32},[],150303329,[95,96,97,98],"*","#","%","_","在使用SQL语句查询数据时,若想要使用Like关键字来匹配单个字符,那么其通配符是( )",{"answer":101,"createTime":35,"id":102,"options":103,"question":108,"source":31,"type":32},[],150303330,[104,105,106,107],"Max(*)","Count(*)","Avg(*)","Sum(*)","下列聚合函数中正确的是( )"]