How do I map this?

[Dushy Inguva]

I have 2 tables Table1 and Table2

Table1:
Primary Key:
A,B,C
Other Columns:
D,E

Table2:
Primary Key:
A,C,D,F
Other Columns:
X
Now, when I load Table1, i want to load rows of Table2 that match the following criteria:
Table1.A = Table2.A and Table1.D = Table2.D

Is this a many-to-many ? Is so, can I map it since i don't have a join table?
[ June 13, 2006: Message edited by: Dushy Inguva ]