A couple of things to realize about Tableau:
- Bringing data into Tableau tends to be a snapshot in time of your data
- Generally Tableau doesn't 'generate' data, it visually displays it
Having said that, if you have a field (or table) in your database that tracks the # of rows each day overtime then Tableau can easily display this field/table. (See 1)
There might be some sort of contorted way of connecting to your data back through time and sussing out the numbers you're looking for, but the overhead/time will be expensive.
Does your table have a 'created date' column or something similar?
If so you could quite easily make a graph or tablbe of number of records by date, and then turn it into a running total to see how the table grows.
This assumes there were no row deletes though!