There is no Undo function for a package installation. Because packaging is a powerful feature that can make significant changes to an instance, back up the instance database before installing a package. This process enables a full restoration if necessary.
An alternate method for undoing a package installation is to create a package of the affected objects in the target instance before installing the new package. This package provides a snapshot of the instance before the new package is installed, which can be used to help undo the changes made by the package installation. New objects created by the package installation must be manually deleted.
