"...tracking how many sales or users exist in databases by watching sequential IDs..." Seems like a great application of the German tank problem [1] that was m

"...tracking how many sales or users exist in databases by watching sequential IDs..." Seems like a great application of the German tank problem [1] that was mentioned on HN the other day. [1] https://en.wikipedia.org/wiki/German_tank_problem https://en.wikipedia.org/wiki/German_tank_problem