Unique Rows using Left outer- I am trying to build a query which will give me unique

[rush2hem]

I am trying to build a query which will give me unique rows. Details:-

Table 1	(F1, F2 are the columns)
F1	F2
1	A1
2	A2
3	A3
4	A4

Table 2 (F3,F4 are the columns)

F3	F4
1	B1
1	B11
2	B2
2	B22

My Query (Incorrect)

select rrn(A), F1,F2,F3,F4 from rush2hem1.T1 A left outer join rush2hem1.T2 B on A.F1=B.F3

This gives me below output which is not what I am looking for:-

RRN	F1	F2	F3	F4
1	1	A1  	1	B1  
1	1	A1  	1	B11 
2	2	A2  	2	B2  
2	2	A2  	2	B22 
3	3	A3  	(null)	(null)
4	4	A4  	(null)	(null)

Expected output that I am building query for is:-

RRN	F1	F2	F3	F4
1	1	A1  	1	B1  
2	2	A2  	2	B2  
3	3	A3  	(null)	(null)
4	4	A4  	(null)	(null)

Please let me know if you have any suggestions.

[Luuk]

you should also explain why this i wrong

2 2 A2 2 B2 
 2 2 A2 2 B22

and this is correct

2 2 A2 2 B2

Should only the first row in Table 2 be returned?
or the one with the shortest (in characters) F4?