You install 2.2 by running the install program and following its instructions. If there are any messages I suggest you look into them, we cannot help without details. The 2.2 beta is ONLY for use on a new instalation. It does not have an update script or any way to update a 2.1 installation.
Thus there are no scripts to do db changes nor any documentation to say if there is any change in the db definitions.
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