How To View Tablespaces in the Current Database?

To view the all the tablespace in the current database use below two views.
1)dba_tablespaces
2)user_tablepsaces

SQL>  SELECT TABLESPACE_NAME, STATUS, CONTENTS FROM DBA_TABLESPACES;

TABLESPACE_NAME                STATUS    CONTENTS
------------------------------ --------- ---------
SYSTEM                         ONLINE    PERMANENT
SYSAUX                         ONLINE    PERMANENT
UNDOTBS1                       ONLINE    UNDO
TEMP                           ONLINE    TEMPORARY
USERS                          ONLINE    PERMANENT
EXAMPLE                        ONLINE    PERMANENT

6 rows selected.

SQL>