How to use Switch Flow, or Switch Activity?

Hi to All,
this is the first time I have to write a large volume management bot.
(50/60 k rows)
I am autonomous in uploading data to DB, and updating tables, but on such large volumes, I need to split the master table, to resurrect the volumes.

I try to explain the project:

  • from a list of 40-50k lines, perform massive searches on SAP.
    dividing the lists, month by month.

How I would like to organize the work:

  • read the table.
  • understand which months are tracked overall. (column 3)
  • divide the search lists by the months plotted in the initial table.

I don’t know how to organize this.
Can someone help me? maybe with the Switch commands I solve?