4 ms·

Joshua Schachter's (del.icio.us) views on auto-incrementing: http://joshua.schachter.org/2007/01/autoincrement.html http://joshua.schachter.org/2007/01/autoincr

• jgrahamc 19y ago
  Another problem with auto_increment occurs when the user id comes from an auto_increment field. By signing up as a new user once a week and observing your own user id you can measure the rate of growth of a competitor.
  • xirium 19y ago
    "By signing up as a new user once a week and observing your own user id you can measure the rate of growth of a competitor." I've done similar with cheques. In a previous job, I was paid by cheque. Each month, I logged the cheque number. From this and taking into account other payment methods, I determined that the company had significantly fewer transactions than the boss claimed.
  • jgrahamc 19y ago
    Using this technique I've found out some interesting things about Digg: http://news.ycombinator.com/item?id=106063 http://news.ycombinator.com/item?id=106063