Or maybe not. Let me quote Moshe from http://lists.drupal.org/pipermail/development/2005-December/012108.html "A long time ago, we made a big effort to be database independent and introducing our own sequences feature was part of that. We wanted to welcome all RDMS, even those without sequences." Let's see mysql -- native (auto_increment modifier) SQLite -- native (auto_increment modifier) postgresql -- native (serial type backed by sequences) Oracle -- doable (via sequences and a trigger) MSQQL -- native (identity type) DB2 -- doable (DEFAULT NEXT_VALUE OF sequence) Firebird -- doable (generator, trigger) MS Access -- native (autoincrement type) Surely I have not covered all possible RDBMSes and the above might contain errors, I just spent ten minutes with googling this together. But still. It seems that most RDBMSes that we considered supporting support these. To continue quoting Moshe, "I'd support a patch that removed drupal sequences in favor of built in auto-increment and such." Let's hope he is not alone because http://drupal.org/node/49836#comment-251682 now contains such a patch. Regards, NK