遇到一道sql语句查询的题，有看到会的帮解答一下

遇到一道sql语句查询的题，有看到会的帮解答一下，sql查询学生的学号和姓名，谢谢

select t1.sno,t1.sname,t2.cname from student t1
inner join sc t2 on t1.sno=t2.sno
where t1.sno like '2018%';

select t1.sname,count(1) from student t1
inner join sc t2 on t1.sno=t2.sno
where 1=1
group by t1.sname;

这样?