Return all possible combinations of values on columns in SQL

Question

How do I return a list of all combinations of values in 2 columns so they are new rows in T-SQL?

e.g.

Col1, Col2
----  ----
1     2
1     4
1     5
<         


        

Answer 1

You can do a self cross join...

SELECT a.Col1, b.Col2
FROM MyTable a
CROSS JOIN MyTable b