[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fWTb0LpE0OUB3VqoDBYT8bmFdsg46gRD8w2_ZuDQWfqc":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":24,"type":25},[],"2024-05-15 20:27:25",143819382,[8,9,10,11],"%","*","#","_",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},21,"3e8654769bc1e047331b88e85be2a882","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9c1e48361b00f3ee2086f4e259ed792b.jpg","数据库管理与应用","work_35001997","第七、八周作业","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( )",[21,26,36,45,54,63,72,81,90,99],{"answer":22,"createTime":5,"id":6,"options":23,"question":19,"source":24,"type":25},[],[8,9,10,11],"v1",0,{"answer":27,"createTime":28,"id":29,"options":30,"question":35,"source":24,"type":25},[],"2024-05-15 20:27:26",143819383,[31,32,33,34],"group by","order by","distinct","desc","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":37,"createTime":28,"id":38,"options":39,"question":44,"source":24,"type":25},[],143819384,[40,41,42,43],"delete from emp WHERE name='dony'","delete * from emp WHERE name='dony'","Drop from emp WHERE name='dony'","Drop * from emp WHERE name='dony'","以下删除记录正确的( )",{"answer":46,"createTime":28,"id":47,"options":48,"question":53,"source":24,"type":25},[],143819385,[49,50,51,52],"SELECT MAX(成绩) FROM A GROUP BY 学科 HAVING MAX(成绩)>80","SELECT 学科 FROM A GROUP BY 学科 HAVING 成绩>80","SELECT 学科 FROM A GROUP BY 学科 HAVING MAX(成绩)>80","SELECT 学科 FROM A GROUP BY 学科 WHERE MAX(成绩)>80","例如数据库中有A表,包括学生、学科、成绩三个字段,数据库结构为: 学生 学科 成绩 张三 语文 60 张三 数学 100 李四 语文 70 李四 数学 80 李四 英语 80 张三 语文 60 如何统计最高分>80的学科?( )",{"answer":55,"createTime":28,"id":56,"options":57,"question":62,"source":24,"type":25},[],143819387,[58,59,60,61],"WHERE sName ! NULL","WHERE sName NOT NULL","WHERE sName IS NOT NULL","WHERE sName != NULL","查找条件为:姓名sName不是NULL的记录( )",{"answer":64,"createTime":28,"id":65,"options":66,"question":71,"source":24,"type":25},[],143819389,[67,68,69,70],"包括20岁不包括30岁","不包括20岁包括30岁","不包括20岁和30岁","包括20岁和30岁","条件"BETWEEN 20 AND 30"表示年龄在20到30之间,且( )",{"answer":73,"createTime":28,"id":74,"options":75,"question":80,"source":24,"type":25},[],143819391,[76,77,78,79],"第2~4条记录","第3~4条记录","第2~5条记录","第3~6条记录","LIMIT 2,4表示的是( )",{"answer":82,"createTime":28,"id":83,"options":84,"question":89,"source":24,"type":25},[],143819393,[85,86,87,88],"select count(*) from user","select count(id) from user","select count(username) from user","select count(1) from user","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?( )",{"answer":91,"createTime":28,"id":92,"options":93,"question":98,"source":24,"type":25},[],143819395,[94,95,96,97],"age <= 22 AND age >= 20","age < 22 AND age > 20","age = 20 AND age = 22","age = 20 OR age = 22","SQL中,"age IN (20, 22)"的语义是( D)",{"answer":100,"createTime":28,"id":101,"options":102,"question":107,"source":24,"type":25},[],143819397,[103,104,105,106],"Order By","Where","Group By","无需配合","Select语句中与having子句同时使用的是( )子句"]