table space administration on PDB in oracle 12c

adding  tablespace to PDB database
connect to the PDB

SQL> ALTER SESSION SET CONTAINER = pdb4;

Session altered.

SQL> SHOW CON_NAME

CON_NAME
------------------------------
PDB4
SQL> create tablespace test datafile '/media/sf_12cR1/12cDB/cdb1/pdb2/pdb4/test.dbf' size 200m;

Tablespace created.

SQL> SELECT name FROM v$datafile;

NAME
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/cdb1/undotbs01.dbf
/media/sf_12cR1/12cDB/cdb1/pdb2/pdb4/system01.dbf
/media/sf_12cR1/12cDB/cdb1/pdb2/pdb4/sysaux01.dbf
/media/sf_12cR1/12cDB/cdb1/pdb2/pdb4/pdb1_users01.dbf
/media/sf_12cR1/12cDB/cdb1/pdb2/pdb4/test.dbf

SQL> DROP TABLESPACE test INCLUDING CONTENTS AND DATAFILES;

Tablespace dropped.

SQL> SELECT name FROM v$datafile;

NAME
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/cdb1/undotbs01.dbf
/media/sf_12cR1/12cDB/cdb1/pdb2/pdb4/system01.dbf
/media/sf_12cR1/12cDB/cdb1/pdb2/pdb4/sysaux01.dbf
/media/sf_12cR1/12cDB/cdb1/pdb2/pdb4/pdb1_users01.dbf

SQL> SELECT tablespace_name FROM dba_tablespaces;

TABLESPACE_NAME
------------------------------
SYSTEM
SYSAUX
TEMP
USERS