How much for different sampling periods, different data is obtained in Google Analytics?

Question

Google Analytics

The problem is that when we filter out results with different dates, the Pts are very different from each other. You can see on the screenshot that when the sampling start date changes, the cost of the order changes on a certain day, and on April 14 there is no order at all in one case, but there is in the other.

Answer 1

google about sampling
otherwise too lazy to figure it out because the data is uncontrolled