order by and group by

You can use an order by clause to order the results of a group by in a particular way.

Put the order by clause after the group by clause. For example, to find the average price of each type of book and order the results by average price, the statement is:

select type, avg(price) 
from titles 
group by type 
order by avg(price) 

type 
---------- ------------ 
UNDECIDED           NULL 
mod_cook          11.49 
psychology        13.50 
business          13.73 
trad_cook         15.96 
popular_comp      21.48 
 
(6 rows affected)