如何从表中获得最低和最高的学生ID [英] How to get lowest and highest student Id from a table
问题描述
我有一个包含以下结构和数据的表格
Class Studentid
1 1
1 2
1 3
1 4
1 5
2 1
2 2
2 3
3 1
3 2
3 3
3 4
4 1
5 1
5 2
我需要取结果最低的学生ID以及最高的学生ID如下
Class Studentid
1 1
1 5
2 1
2 3
3 1
3 4
4 1
5 1
5 2
I have a table with the following structure and with the data
Class Studentid
1 1
1 2
1 3
1 4
1 5
2 1
2 2
2 3
3 1
3 2
3 3
3 4
4 1
5 1
5 2
I need to take the result The the lowest student id and the highest student id as follow as
Class Studentid
1 1
1 5
2 1
2 3
3 1
3 4
4 1
5 1
5 2
推荐答案
嗨Sacraj，
我创建了一个架构，你可以以下查询获取记录
Hi Sacraj,
I have created a schema and you could use the below query to get the records
create table sellowhigh(class int,ranks int)
insert into sellowhigh values(1,1),(1,2),(1,3),(1,4),(2,1),(2,2),(2,4),(3,1),(3,2),(3,3),(3,7),(4,2),(4,3),(4,5),(4,8)
select * from sellowhigh
select class,min(ranks)as ranks from sellowhigh group by class union
select class,max(ranks)as ranks from sellowhigh group by class
班级 等级
1 1
1 4
2 1
2 4
3 1
3 7
4 2
4 8
我希望这会对你有所帮助。
问候，
RK
class Ranks
1 1
1 4
2 1
2 4
3 1
3 7
4 2
4 8
I hope this helps you a bit.
Regards,
RK
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