this script uses a db_version value to run upgrade code to incrementally bring the database up-to-date with the current version of webwork. it can also detect and empty database and initialize it with any system (non-course) tables (like the depths table) and initilize an up-to-date db_version value.
Changed paths:
trunk/webwork-modperl/bin/wwdb_upgrade
trunk/webwork2/bin/wwdb_upgrade