Question

I have a table with data like this

ID | second_col    
1  |    1
1  |    2
1  |    3
2  |    1
2  |    4
3  |    1
3  |    5
4  |    1

and i want select records from duplicated rows with the biggest number in second_col

the result should look as follows…

ID | second_col    
1  |    3
2  |    4
3  |    5
4  |    1  

Answer 1

Assuming SQL Server is being used, you could do the following:

SELECT ID, MAX(second_col)
FROM table
GROUP BY ID