Sample In-DB Tool Sample through workflow

Hello. 

Does the Sample In-DB tool draw repeated samples as its output is used at different points in a workflow? For example, if 'Sample In-DB' output is used input to two sub streams of work: Say 1) Formula and 2) Join, will the base sample chosen for both sets be the same or can be different?

I find that the sample chosen changes as the workflow proceeds along the two paths and would like to confirm if this is the case.

Thank you very much!