Unioning two tables with different number of columns

Question

I have two tables (Table A and Table B).

These have different number of columns - Say Table A has more columns.

How can I union these two table and get null

Answer 1

if only 1 row, you can use join

Select t1.Col1, t1.Col2, t1.Col3, t2.Col4, t2.Col5 from Table1 t1 join Table2 t2;