SQL: Select most recent date for each category

SELECT
    category_a,
    category_b,
    MAX(date)
FROM
    Some_Unnamed_Table
GROUP BY
    category_a,
    category_b
ORDER BY
    category_a,
    category_b

I certainly don’t mind helping people when I can, or I wouldn’t be on this site, but did you really search for an answer for this before posting?