Restore your 6.20 backup into the 6.22 database and run update.php.

Nancy

Injustice anywhere is a threat to justice everywhere. -- Dr. Martin L. King, Jr.

From: John Mitchell

I have an existing drupal 6.20 database backed up and restored to another postgres database.
I also have a new version of drupal 6.22 on another box which is ready for installation.
Can I just point this new version of drupal to this newly restored postgres database and if so how would I do this?