练习作业

【上机作业】【SQL】2010.4.17 数据查询的练习

查询 SQL Server 课程分布在 70~90之间的学生所在专业

use students
go

select class
from stu
where stuid in(select stuid
from scores
where couid=’B002′ and score between 70 and 90
)

查询每个班级的学生人数

use students
go
select class,count(*) as 人数
from stu
group by class

查询课程名称包含”计算机”3个字的课程

use students
go
select *
from course
where couname like ‘%计算机%’

查询每个学期开设课程数目大于2的学期

use students
go
select count(*)
from scores
group by term
having count(*)>2

查询”英语”成绩在前三名的学生信息 ,注意分数相等的情况

use students
go
select *
from stu
where
stuid in(
select top 3 with ties stuid
from scores
where couid=’A001′
order by score desc)

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