mysql union different number of columns

Question

I know union queries have to have the same number of columns. I\'m trying to get results from the table comments and results from the table strings

Answer 1

You would want to select columns as NULL to take up for the empty space in certain tables.

Table A: (id, column1)

Table B: (id, column1, column2)

Select id, column1, null as column2 from tableA
UNION
Select id, column1, column2 from tableB