Id	Operation            Name    	 Rows  	Bytes 	 TempSpc	 Cost    (%CPU)

 0 	SELECT STATEMENT                 2000K   3906K                   104K     (4)
 1 	SORT GROUP BY                    2000K   3906K     30M           104K     (4)	    
 2 	TABLE ACCESS FULL     EMP        2000K   3906K                   99312    (4)