[Konstantinos]

PHP код:

"SELECT IF(COUNT(*) = SUM(CASE WHEN Org=1 THEN 1 ELSE 0 END),1,0) FROM Player" 


Result will be either 1 or 0 depending on whether the total players is equal to the player that have "Org" set to 1.

EDIT: Use zPain's version. The speed is not even noticeable (~20-50 microseconds for 650 rows) but more readable and understandable.