我怎么样用TABLE控件操作多个DB库

你用一公用table1与一公用tdatasource就行了,用如下过程实现;
procedure opentable(tablename:string);
var
  table1:ttable;
begin
try
   table1:=ttable.create(application);
   table1.datasource:={此为公用tdatasource名};
   table1.tablename:=tablename;
   table1.active:=true;
finally
   table1.free;
end;
end;