Você pode tentar JOIN-los (vinculando-os) ou usar UNION (combinar duas seleções em uma);
http://dev.mysql.com/doc/refman/5.0 /en/join.html
select a.col1, b.col1
from table1 a
inner join table2 b on a.id = b.id;
http://dev.mysql.com/doc/refman/5.0 /en/union.html
select name as col1, surname as col2 from table1
union
select location as col1, desc as col2 from table2;
John
