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

Does this work? If not, could you include the results in your question? Ordering on an expression ought to work as expected.

SELECT `post_id`, `karma_up`, `karma_down`, `karma_up` - `karma_down` AS `total`
ORDER BY `total` DESC

Answer 2

SELECT *, karma_up - karma_down AS karma_total 
FROM MyTable
ORDER BY karma_total DESC;

Answer 3

Very simple

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