Oracle 12c: Opening a PDB Using SQL Developer

You can open Pluggable database using SQL Deverloper

Make a connection to the CDB and using the DBA view expand the container database.

Select the PDB1 database

 Right click on PDB1 & Select the Modify State.

Select the READ ONLY.

You can see the Status of PDB1 database. (Read Only)

Create user for testing....You are getting error because PDB1 database read only mode.

Now you start the PDB1 database.