Du kan prøve enten at JOIN dem (sammenkæde dem) eller bruge UNION (Kombiner to udvalg i én);
http://dev.mysql.com/doc/refman/5.0 /da/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 /da/union.html
select name as col1, surname as col2 from table1
union
select location as col1, desc as col2 from table2;
John