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    select sname,ssex,class from t_hq_student;
    
    select distinct depart from t_hq_teacher;
    
    select * from t_hq_student;
    
    select * from t_hq_score where degree between 60 and 80;
    
    select * from t_hq_score where degree in ('85','86','88');
    
    select * from t_hq_student where class like'95031' or ssex like '';
    
    select * from t_hq_student order by class desc;
    
    select * from t_hq_score order by cno;
    
    select * from t_hq_score order by degree desc;
    
    select class, count(1) as 人数 from t_hq_student where class ='95031' group by class;
    
    select * from t_hq_score where  degree >= all(select degree from t_hq_score);
    
    select cno,avg(degree) as 平均成绩 from t_hq_score group by cno;
    
    select sno from t_hq_score where degree > 70 and degree < 90;
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  • 原文地址:https://www.cnblogs.com/zhuxiaolin/p/4918856.html
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