完成SQL语句:按班级编号分组统计每个班的人数,最高分,最低分,平均分,并按平均分降序排序。相关知识点: 试题来源: 解析 select classno, count(*), max(score), min(score), avg(score) from student group by classno order by avg(score) desc; ...
1、Maven导入hadoop-client包 org.apache.hadoop hadoop-client 2.7.3 2、core-site....