I uploaded Authentication file and then I need to know How long did seesion Id(for example no. 5) take?
Can anyone help me please
You need to provide more information than that before anybody could give you any real help.
Depending on what kind of file you've uploaded, and how sessions are represented in those messages there are a few ways of finding out the session duration.
It's always a good idea to provide a few sample events, and a description of the desired output.