Reports & Discoverer :: Pass Parameters In Table Section?

I have a problem here.Normally, we use &p_where inside a sql script in condition sectione.g :
select name from member where name like 'a%' &p_where order by name;

may i use this kind of parameter in table section?e.g :
select name from &p_table where name like 'a%' and status = 'a' order by name;

the reason i need to do is there are 2 different server. but i need retrieve same info.server ABC have table A but don't have table B and server DEF have table B but don't have table A.

Is there any other method to solve this problem?