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Categories / Oracle PLSQL Tutorial / System Tables Data Dictionary
 

Get information on all the tables you have access to using all_tables

SQL> SQL> desc all_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 * from all_tables;