System Tables Data Dictionary Oracle PLSQL Tutorial

SQL> desc dba_tables;
 Name                              Null?    Type
 ----------------------------------
 OWNER                             NOT NULL VARCHAR2(30)
 TABLE_NAME                        NOT NULL VARCHAR2(30)
 TABLESPACE_NAME                            VARCHAR2(30)
 CLUSTER_NAME                               VARCHAR2(30)
 IOT_NAME                                   VARCHAR2(30)
 STATUS                                     VARCHAR2(8)
 PCT_FREE                                   NUMBER
 PCT_USED                                   NUMBER
 INI_TRANS                                  NUMBER
 MAX_TRANS                                  NUMBER
 INITIAL_EXTENT                             NUMBER
 NEXT_EXTENT                                NUMBER
 MIN_EXTENTS                                NUMBER
 MAX_EXTENTS                                NUMBER
 PCT_INCREASE                               NUMBER
 FREELISTS                                  NUMBER
 FREELIST_GROUPS                            NUMBER
 LOGGING                                    VARCHAR2(3)
 BACKED_UP                                  VARCHAR2(1)
 NUM_ROWS                                   NUMBER
 BLOCKS                                     NUMBER
 EMPTY_BLOCKS                               NUMBER
 AVG_SPACE                                  NUMBER
 CHAIN_CNT                                  NUMBER
 AVG_ROW_LEN                                NUMBER
 AVG_SPACE_FREELIST_BLOCKS                  NUMBER
 NUM_FREELIST_BLOCKS                        NUMBER
 DEGREE                                     VARCHAR2(10)
 INSTANCES                                  VARCHAR2(10)
 CACHE                                      VARCHAR2(5)
 TABLE_LOCK                                 VARCHAR2(8)
 SAMPLE_SIZE                                NUMBER
 LAST_ANALYZED                              DATE
 PARTITIONED                                VARCHAR2(3)
 IOT_TYPE                                   VARCHAR2(12)
 TEMPORARY                                  VARCHAR2(1)
 SECONDARY                                  VARCHAR2(1)
 NESTED                                     VARCHAR2(3)
 BUFFER_POOL                                VARCHAR2(7)
 ROW_MOVEMENT                               VARCHAR2(8)
 GLOBAL_STATS                               VARCHAR2(3)
 USER_STATS                                 VARCHAR2(3)
 DURATION                                   VARCHAR2(15)
 SKIP_CORRUPT                               VARCHAR2(8)
 MONITORING                                 VARCHAR2(3)
 CLUSTER_OWNER                              VARCHAR2(30)
 DEPENDENCIES                               VARCHAR2(8)
 COMPRESSION                                VARCHAR2(8)
 DROPPED                                    VARCHAR2(3)
SQL>
SQL> select owner, table_name, tablespace_name
  2  from dba_tables
  3  where owner in ('SCOTT', 'HR')
  4  order by owner, tablespace_name, table_name;
OWNER                          TABLE_NAME                     TABLESPACE_NAME
------------------------------ ------------------------------ ------------------------------
HR                             DEPARTMENTS                    USERS
HR                             EMPLOYEES                      USERS
HR                             JOBS                           USERS
HR                             JOB_HISTORY                    USERS
HR                             LOCATIONS                      USERS
HR                             REGIONS                        USERS
HR                             COUNTRIES
7 rows selected.
SQL>