sql语句,如何查询一个班的学生成绩都及格的学生的姓名

[huang_gen]

表结构
成绩表（学生姓名，班级，成绩）；
主键（学生姓名，班级）；
select 班级，学生姓名
from 成绩表
where 成绩>60 and ........
关键是如何判断一个班的都及格了？？？？？？？？？？？？？？？？？？

[王向飞]

看不及格的学生是哪个班的？
↑
再查不再以上范围的班的ID ？

[快溜]

select 班级，学生姓名
  from 成绩表
  where 成绩>60 and 班级 not in (select distinct 班级 from 成绩表 where 成绩<60)

[lds1ove]

select *
from 成绩表 t
 where not exists(select 1 from 成绩表 where t.班级=班级 and t.成绩<60 )

[AcHerat]

select 班级,sum(case when 成绩>=60 then 1 else 0 end)及格人数,count(*)总人数
from 成绩表
group by 班级

[--小F--]

http://topic.csdn.net/u/20091123/11/2f7d090a-33e8-4382-a40b-438517b877b6.html

看了这个你就觉得这些都容易了

[AcHerat]

with cte as
(
    select 班级,sum(case when 成绩>=60 then 1 else 0 end)及格人数,count(*)总人数
    from 成绩表
    group by 班级
)

select 班级,(case when 及格人数 < 总人数 then '不完全及格' else '全部及格' end)及格标识
from cte

[ljking0731]

if (select count(0) from 成绩表)=(select count(0) from 成绩表 where 成绩>=60)
print '都及格了'
else
print '有人不及格'

[lds1ove]

[Quote=引用 2 楼 ssp2009 的回复:]
.
select 班级，学生姓名
from 成绩表
where 班级 not in (select distinct 班级 from 成绩表 where 成绩<60)
[/Quote].

[--小F--]

SQL语句练习题参考答案 
1、 select Sname,Ssex,Class from Student;
2、 select distinct depart from teacher;
3、 select Sno as '学号',Sname as '姓名',Ssex as '性别',Sbirthday as'出生日期',Class as'班号'from student;
或
select Sno as 学号,Sname as 姓名,Ssex as 性别,Sbirthday as 出生日期,Class as 班号 from student;
4、 select * from score where degree between 60 and 80;
或select * from score where degree>=60 and degree<=80;
5、 select * from score where degree in (85,86,88);
6、 select * from student where class='95031'or Ssex='女';
7、 select * from student order by class desc;
8、 select * from score order by cno asc ,degree desc;
或select * from score order by cno ,degree desc;
9、 select count(*) as CNT from student where class='95031';
10、select Sno as '学号',cno as '课程号', degree as '最高分' from score
where degree=(select max(degree) from score)
11、select avg(degree)as 课程平均分 from score where cno='3-105';
12、select cno,avg(degree) from score where cno like'3%'group by cno having   count(*) >5;
13、select Sno from score group by Sno having min(degree)>70 and max(degree)<90;
14、select student.Sname,score.Cno,score.degree from student,score where student.Sno=score.Sno;
15、select x.Sno,y.Cname,x.degree from score x,course y where x.Cno=y.Cno;
16、select x.Sname,y.Cname,z.degree from student x,course y,score z where x.Sno=z.Sno and z.Cno=y.Cno;
17、select y.Cno,avg(y.degree) from student x,score y where x.Sno=y.Sno and x.class='95033'group by y.cno;
18、select Sno,Cno,rank from score,grade where degree between low and upp order by rank;
19、select x.Cno,x.Sno,x.degree from score x,score y
where x.cno='3-105' and x.degree>y.degree and y.sno='109'and y.cno='3-105';
20、
1,查询成绩非本科最高 select *   from score b   where degree <(select max(degree) from score a where a.cno=b.cno);
2,查询成绩非本科最高并且选2门以上的学生的成绩:
21、select x.cno,x.Sno,x.degree from score x,score y where x.degree>y.degree and y.sno='109'and y.cno='3-105';
select cno,sno,degree from score   where degree >(select degree from score where sno='109' and cno='3-105')
22、select sno,sname,sbirthday from student where to_char(sbirthday,'yyyy')=(select to_char(sbirthday,'yyyy') from student where sno='108');
23、select cno,sno,degree from score where cno=(select x.cno from course x,teacher y where x.tno=y.tno and y.tname='张旭');
24、select tname from teacher where tno in(select x.tno from course x,score y where x.cno=y.cno group by x.tno having count(x.tno)>5);
25、select * from student where class in('95033','95031');
26、select distinct cno from score where degree in (select degree from score where degree>85);
27、select * from score where cno in(select x.cno from course x,teacher y where y.tno=x.tno and y.depart='计算机系');
28、select tname,prof from teacher where depart='计算机系' and prof not in (select prof from teacher where depart='电子工程系');
29、select * from score where cno='3-105' and degree>any (select degree from score where cno='3-245')order by degree desc;
30、select * from score where cno='3-105' and degree>all(select degree from score where cno='3-245');
31、select tname,tsex,tbirthday from teacher
union select sname,ssex,sbirthday from student;
32、select tname,tsex,tbirthday from teacher where tsex='女'
union select sname,ssex,sbirthday from student where ssex='女';
33、select * from score a where degree<(select avg(degree)
from score b where a.cno=b.cno);
34、select tname,depart from teacher a where exists
(select * from course b where a.tno=b.tno);
35、select tname,depart from teacher a where not exists
(select * from course b where a.tno=b.tno);
36、select class from student where ssex='男'group by class having count(*)>=2;
37、select * from student where sname not like'王_';
38、select sname as 姓名,(to_char(sysdate,'yyyy')-to_char(sbirthday,'yyyy')) as 年龄 from student
39、select sname,sbirthday as 最大 from student where   sbirthday =(select min (sbirthday) from student)
union select sname,sbirthday as 最小 from student where sbirthday =(select max(sbirthday) from student)  
40、select class,sname,sbirthday from student order by class desc,sbirthday;
41、select x.tname,y.cname from teacher x,course y where x.tno=y.tno and x.tsex='男';
42、select * from score where degree=(select max(degree)from score);
43、select sname from student where ssex=(select ssex from student where sname='李军');
44、select sname from student where ssex=(select ssex from student where sname='李军') and class=(select class from student where sname='李军');
45、select * from score where sno in(select sno from student where ssex='男') and cno=(select cno from course
where cname='计算机导论');

[lds1ove]

8F臭不要脸的

[NO66781]

[Quote=引用 10 楼 lds1ove 的回复:]

8F臭不要脸的
[/Quote]
呵。。呵。。。8F的挺全啊。。。呵。。呵。。