12.) Now you have two different tables - each with two columns.

Table #1

Single Column

2 rows with a value equal to 1 and 2



Table #2

Single column

2 rows with a value equal to 2 and 4

Construct a statement returning in a single column all the values
contained, but not the common values.

This is another question that I got in an interview, I missed
it.......

Thanks,

Tim