1.查询一个学生在某一年的所有成绩
select sc_student_id as 学号,sc_student_name as 姓名,
sc_course_name as 课程,sc_score as 分数
from t_score
where sc_student_id = 学生学号
and sc_edu_year = 201x-201x;
查询实例1
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2.查询某一个班的高等数学的成绩
select cl.班级,cl.学生姓名,sc.sc_course_name as 科目,sc.sc_score as 成绩
from
(select st.st_class as 班级,st.st_name as 学生姓名,
from t_student as st
where st.st_class = 班级名) cl
left join t_score as sc
on cl.学生姓名 = sc.sc_student_name
where sc_course_name = "高等数学"
order by 成绩
查询实例2
