One of the critical steps in the install process is making any needed database changes required by your package. We provide you with two options for making these changes. If your package includes a custom assembly, we highly recommend that your assembly include both up and down migrations. These migrations will be run for both the install (up) and uninstall (down).If your package does not require a custom assembly, you can include a SQL file in your install package. For installs, this file should be in the root install folder and should be named run.sql. Uninstall SQL should use the same file name, but be in the root uninstall folder.