Junte-se a todos eles:
SELECT t1.col1, t1.col2, t2.colA, t2.colB, t3.colTest, t3.colBlah
FROM tab1 AS t1
CROSS JOIN tab2 AS t2
CROSS JOIN tab3 AS t3
SELECT t1.col1, t1.col2, t2.colA, t2.colB, t3.colTest, t3.colBlah
FROM tab1 AS t1
CROSS JOIN tab2 AS t2
CROSS JOIN tab3 AS t3