Question

Imagine a table T with two fields f1 and f2

Lets put some dummy values:

(1,2) , (1,3) , (1,4), (2,2), (4,1), (4,2) 

I would like to retrieve the max value of f2 for each f1 namely I would like my query to return :

(1,4), (2,2), (4,2)

How can I achieve this ?

Answer 1

You have to use group by and aggregate function max()

select f1,max(f2)
from tab
group by f1

Links to more informations:

• GROUP BY
• MAX()