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How to Drop a Pluggable Oracle Database in Vagrant Centos 8

 To drop a Pluggable Database (PDB) in an Oracle database running on a CentOS virtual machine managed by Vagrant, you can use SQL*Plus or SQL Developer, which are common tools for managing Oracle databases. Here's a general outline of the steps to drop a PDB: 1. Connect to the Oracle Database:    - Open a terminal in your CentOS VM.    - Launch SQL*Plus by running the following command and providing the necessary login information when prompted:      ```bash      sqlplus / as sysdba      ```    - This command connects you to the Oracle Database as a superuser (SYSDBA). 2. Switch to the Container Database (CDB) Context:    - Before you can drop a PDB, you need to switch to the CDB context. Use the following SQL*Plus command:      ```sql      ALTER SESSION SET CONTAINER = CDB_NAME;      ```    - Replace `CDB_NAME` with the actual name of your CDB...