steps to create PDB manually in 12c

Create a Pluggable Database (PDB) Manually

To create a new pluggable database from the seed database, all we have to do is tell Oracle where the file should be placed. We can do this using one of two methods. The first method uses the FILE_NAME_CONVERT clause in the CREATE PLUGGABLE DATABASE statement.

CONN / AS SYSDBA

SQL>CREATE PLUGGABLE DATABASE pdb3 ADMIN USER pdb_adm IDENTIFIED BY Password1

  FILE_NAME_CONVERT=('/u01/app/oracle/oradata/cdb1/pdbseed/','/media/sf_12cR1/12cDB/cdb1/pdb2/');

database created.

SQL> ALTER PLUGGABLE DATABASE pdb3 OPEN READ WRITE;

SQL> SELECT name, open_mode
FROM   v$pdbs
ORDER BY name;
  2    3
NAME                           OPEN_MODE
------------------------------ ----------
PDB$SEED                       READ ONLY
PDB1                           READ WRITE
PDB2                           READ WRITE
PDB3                           READ WRITE