How to get the value associated with min of one column and the value associated with the max of the same column?

Question

I have an original table with records of orders. How can go about getting an output where my result gives me the origin of the first leg and the destination of the final leg for the same order number?

ORDER_NUMBER	LEG_NUMBER	ORIGIN	DESTINATION
ORD_200	1	Utah	California
ORD_200	2	California	New York
ORD_200	3	New York	Pennsylvania

Desired Output:

ORDER_NUMBER	ORIGIN	DESTINATION
ORD_200	Utah	Pennsylvania

Answer 1

You can use a window function and distinct

select distinct ORDER_NUMBER
      , first_value(ORIGIN) over(partition by ORDER_NUMBER order by LEG_NUMBER ) ORIGIN
      , first_value(DESTINATION) over(partition by ORDER_NUMBER order by LEG_NUMBER desc) DESTINATION
from tbl