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Homework/Homework250327/Homework250327.sql

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+-- 查找至少有2名男生的班号
+select class from student where sex=N'男' group by class having count(*) >= 2;
+Go
+-- 查找student表中不姓王的同学
+select * from student where name not like N'王%';
+Go
+-- 查找student表中每个学生的姓名和年龄
+select name, year(getdate())-year(birthday) age from student;
+Go
+-- 查询student表中最大生日和最小生日的学生
+select * from student where birthday = (select min(birthday) from student)
+union
+select * from student where birthday = (select max(birthday) from student);
+Go
+-- 以班号和年龄从大到小的顺序显示学生信息
+select * from student order by class desc, birthday;
+Go
+-- 查找男教师的姓名及其上的课程的名称
+select name, cname from course, teacher where no=tno and sex=N'男';
+Go
+-- 查找最高分同学的no, cno, degree
+select * from score where degree = (select max(degree) from score);
+Go
+-- 查找和李军同学同性别，同班级的所有学生的姓名
+select name from student
+            where sex=(select sex from student where name=N'李军')
+            and class=(select class from student where name=N'李军');
+except select name from student where name=N'李军';
+Go