DSXchange

I am able to extract the data using oracle enterprise stage parallely.what i am doing is under Server options: partition table is name of the table, query is user defined query and i have written a query. when i compared the counts produced when i extracted paralley with the extracted count produced when i run without using partiton table property, both counts seem equal. But my Question is this approach reliable. are the counts going to be same all the time? Does this have any affect if we do a join to another table with the extracted data