Thanks, Jesus, for your atention.
I did more tests and realise that we don't have a real big data to Interact.
It is, at greater table, about 1 milion records, and its size is about 90 megabytes.
I just read all data in the memory and we don't have any problem.
Now, to see this data, we need use something like PivotGrid, where it is possible mix several columns from diferentes tables, like city names from one and products sold from another table...
How can I get this? What componente must I use?
...
Ricardo Ildefonso