Calculating the Running Maximum
Is there some way to calculate a running maximum either through ETL/SQL?
I have employee hiring data and I want to check if an employee newly hired into a position is a backfill or a new growth. This classification is part of others that are used in existing charts showing how many active/hired/job change/terminations employees we have each month. My strategy at the moment is the calculate the count of employees in each position each month. I want to use this count in finding the running maximum which I will compare to the current count to determine if it a new position or a backfill position.
I'm open to hearing other strategies to approach this problem as well.