Get nearest records to specific date grouped by type

Question

I\'m sorry I can\'t be more specific, but I don\'t know how to describe my problem in the title.. respectively I don\'t know how to search for similar question.

So h

Answer 1

Right now I can only think of a subselect version:

SELECT type, amount
FROM table AS t
WHERE dat = (
    SELECT MAX(dat)
    FROM table
    WHERE type=t.type
        AND dat <= '2011-03-01'
)