combining two tables

If I have two tables with the following data:
Table_A
A
B
C
Table_B
1
2
3
is there a way to make a select the gives me this result(in separate columns):
A 1
A 2
A 3
B 1
B 2
B 3
C 1
C 2
C 3select A.col1,B.col1
FROM table_A A,table_B B

good luck with school.|||hahaha, been using only joins, didn't remember about that, thanks