How to get lowest and highest student Id from a table

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SQL-Server-2008

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

Posted 2-Jan-14 23:09pm

sacraj

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♥…ЯҠ…♥ · Answer 1 · 2014-01-02T23:31:00

Solution 1

Hi Sacraj,

I have created a schema and you could use the below query to get the records

SQL

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

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

Posted 2-Jan-14 23:31pm

♥…ЯҠ…♥

Updated 2-Jan-14 23:32pm

v2

Comments

Christian Graus 3-Jan-14 17:12pm

select class, min(ranks) as minValue, max(ranks) as maxValue from sellowhigh group by class will work just fine.

♥…ЯҠ…♥ 3-Jan-14 23:02pm

Look at the result, he dont want to display as min, max column, he wants it to be in next record for every class

Christian Graus 3-Jan-14 23:11pm

You're right. So what you're actually missing, is an order by :-)