SQL- query to find out the distinct values from two tables

There are two tables

   tabA1                  tabA2
NUM    CODE            CODE   ITEMS
1001	A               A  	paper
1002	B               C  	milk
1003	C               E  	paper
1004	A  
1005	B  
1006	B  

output should be

       output 
   CODE     CODE_1           
    A  	    A  
    B  	
    C 	    C  
            E  

Using full outer join and distinct keyword

The Query

SELECT
   A1.Code, A2.Code
FROM
   (SELECT DISTINCT Code FROM TabA1) A1
   FULL OUTER JOIN
   (SELECT DISTINCT Code FROM TabA2) A2
              ON A1.Code = A2.Code

Using join and UNION operator

The Query

SELECT t1.Code, t2.Code
FROM TabA1 T1,TABA2 T2
WHERE t1.code=t2.code(+) --left outerjoin

UNION

SELECT t1.Code, t2.Code
FROM TabA1 T1,TABA2 T2
WHERE t1.code(+)=t2.code --right outer join

output on tool