Order By Sum of Two Fields

Question

Let\'s say I have a table with karma_up and karma_down. Everytime someone votes up karma_up gets incremented and everytime someone votes down karma_down gets incremented on

Answer 1

Very simple

SELECT 
ID, KARMA_UP, KARMA_DOWN, (KARMA_UP-KARMA_DOWN) AS USER_KARMA 
FROM KARMA 
ORDER BY USER_KARMA DESC