Sample data:
a b
------- ---------
1 / 2
1 / 3
2 / 1
3 / 1
3 / 2
2 / 1
3 / 2
I have the above sample data. What i want is to select the unique (and distinct) rows of the combination A and B. In the above example the only matching results are
A B
------- ---------
1 / 2
2 / 1
db used: access Tanks