SQL query (general)

i have the following table  R
id    a1    a2
1    A    B
2    A    B
3    B    C
4    C    A
5    B     C

and to write  q uery thats outputs the following
id    a1    a2
1    A    B
2    A    B
3    B    C
5    B    C

Is the following query correct?
select *
from  (select *       from R       groupby a1) as T1,   (select *       from R       groupby a1) as T2,
where T1.id<>T2.id
AND T1.a1=T2.a1
AND T1.a2=T2.a2;

please correct.