Previous Next JavaScript must be enabled to correctly display this content

## C.3 Cleaning Up After a Failed Installation

Learn about best practices for troubleshooting and cleaning up after a failed installation.

In a successful installation the following banner displays near the end of the installation:

    Thank you for installing Oracle APEX.
    Oracle APEX is installed in the APEX_260100 schema.

To reinstall, you must either drop the APEX database schemas, or run a script to completely remove APEX from the database, depending upon the installation type.

- Reverting to a Previous Release After a Failed Upgrade Installation
  Learn about reverting to Oracle APEX to a previous release in the case of a failed upgrade installation.
- Removing APEX from the Database
  Start SQLcl and connect to the database where Oracle APEX is installed as `SYS` specifying the `SYSDBA` role and execute the `SQL> @apxremov.sql` command.

Parent topic: APEX Installation Troubleshooting