Discuss / SQL / 作业

作业

Topic source

大笑肖肖

#1 Created at ... [Delete] [Delete and Lock User]

第一题:select  class_id,round(avg(score),2) from students group by class_id;

第二题:select class_id, gender,  round(avg(score),2) from students group by class_id,gender;


  • 1

Reply