If you want to estimate the total # of items in a DB based on auto-increment ID numbers, you can use: https://en.m.wikipedia.org/wiki/German_tank_problem https:

If you want to estimate the total # of items in a DB based on auto-increment ID numbers, you can use: https://en.m.wikipedia.org/wiki/German_tank_problem https://en.m.wikipedia.org/wiki/German_tank_problem (Apparently this was used by militaries in WW2, to estimate the total number of tanks from the serial numbers printed on them.)