SUM(
   CASE 
	WHEN `action_type` = 'single' THEN 
	    CASE 
	        WHEN `action` = '2' THEN netWin 
	        WHEN `action` = '3' THEN -netWin 
	        ELSE 0 
	    END
	WHEN `action_type` = 'multiple' THEN 
	 	CASE 
	 		  WHEN `action` = '2' THEN netWin
	        ELSE 0 
	    END
	ELSE 0 
 END
)