Question

I have table consisting of these fields:

 id  |   date_from  | date_to      |   price
 --------------------------------------------
 CK1     22-12-2012   29-12-2012       800
 CK1     22-12-2012   29-12-2012       1200
 CK2     22-12-2012   29-12-2012       1400
 CK2     22-12-2012   29-12-2012       1800
 CK2     22-12-2012   29-12-2012       2200

How do I create SQL select that groups results by ID, DATE_FROM, DATE_TO and picks lowest value from price.

So result would be

 CK1     22-12-2012   29-12-2012       800
 CK2     22-12-2012   29-12-2012       1400

Answer 1

select id, date_from, date_to, min(price)
from table
group by id, date_from, date_to