I am inexperienced with cursors and need to use one (I think).
What does this do for me:

select bundle;
from data1;
into cursor 2ft;
where grade = gdValue and siz = szValue and length = 2;
union all;
select bundle;
from data2 ;
where grade = gdValue and siz = szValue and length = 2 ;
union all;
select bundle;
from data3 ;
where grade = gdValue and siz = szValue and length = 2 ;
union all;
select bundle;
from data4 ;
where grade = gdValue and siz = szValue and length = 2 ;
union all;
select bundle;
from data5 ;
where grade = gdValue and siz = szValue and length = 2 ;
union all;
select bundle;
from data6 ;
where grade = gdValue and siz = szValue and length = 2 ;
union all;
select bundle;
from data7 ;
where grade = gdValue and siz = szValue and length = 2 ;
union all;
select bundle;
from data8 ;
where grade = gdValue and siz = szValue and length = 2