mysql combina os resultados da consulta lado a lado

Você pode fazer isso usando RIGHT JOIN e atribua um id a cada uma de suas tabelas usando ROW_NUMBER . Veja minha consulta abaixo:

 SELECT A.column1,A.column2,B.column1,B.column2 FROM
    (SELECT
         @row_number1:[email protected]_number1+1 AS RowNumber1,
         column1,
         column2
    FROM Table1, (SELECT @row_number1:=0)AS x ORDER BY column1) AS A
    RIGHT JOIN
    (SELECT
         @row_number2:[email protected]_number2+1 AS RowNumber2,
         column1,
         column2
    FROM Table2, (SELECT @row_number2:=0)AS y ORDER BY column1) AS B
    ON A.RowNumber1=B.RowNumber2