Oracle PL/SQL Tutorial/System Tables Data Dictionary/all indexes

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Get information on all the indexes you have access to using all_indexes.

SQL>
SQL> desc all_indexes;
 Name                    Null?    Type
 OWNER                   NOT NULL VARCHAR2(30)
 INDEX_NAME              NOT NULL VARCHAR2(30)
 INDEX_TYPE                       VARCHAR2(27)
 TABLE_OWNER             NOT NULL VARCHAR2(30)
 TABLE_NAME              NOT NULL VARCHAR2(30)
 TABLE_TYPE                       CHAR(5)
 UNIQUENESS                       VARCHAR2(9)
 COMPRESSION                      VARCHAR2(8)
 PREFIX_LENGTH                    NUMBER
 TABLESPACE_NAME                  VARCHAR2(30)
 INI_TRANS                        NUMBER
 MAX_TRANS                        NUMBER
 INITIAL_EXTENT                   NUMBER
 NEXT_EXTENT                      NUMBER
 MIN_EXTENTS                      NUMBER
 MAX_EXTENTS                      NUMBER
 PCT_INCREASE                     NUMBER
 PCT_THRESHOLD                    NUMBER
 INCLUDE_COLUMN                   NUMBER
 FREELISTS                        NUMBER
 FREELIST_GROUPS                  NUMBER
 PCT_FREE                         NUMBER
 LOGGING                          VARCHAR2(3)
 BLEVEL                           NUMBER
 LEAF_BLOCKS                      NUMBER
 DISTINCT_KEYS                    NUMBER
 AVG_LEAF_BLOCKS_PER_KEY          NUMBER
 AVG_DATA_BLOCKS_PER_KEY          NUMBER
 CLUSTERING_FACTOR                NUMBER
 STATUS                           VARCHAR2(8)
 NUM_ROWS                         NUMBER
 SAMPLE_SIZE                      NUMBER
 LAST_ANALYZED                    DATE
 DEGREE                           VARCHAR2(40)
 INSTANCES                        VARCHAR2(40)
 PARTITIONED                      VARCHAR2(3)
 TEMPORARY                        VARCHAR2(1)
 GENERATED                        VARCHAR2(1)
 SECONDARY                        VARCHAR2(1)
 BUFFER_POOL                      VARCHAR2(7)
 USER_STATS                       VARCHAR2(3)
 DURATION                         VARCHAR2(15)
 PCT_DIRECT_ACCESS                NUMBER
 ITYP_OWNER                       VARCHAR2(30)
 ITYP_NAME                        VARCHAR2(30)
 PARAMETERS                       VARCHAR2(1000)
 GLOBAL_STATS                     VARCHAR2(3)
 DOMIDX_STATUS                    VARCHAR2(12)
 DOMIDX_OPSTATUS                  VARCHAR2(6)
 FUNCIDX_STATUS                   VARCHAR2(8)
 JOIN_INDEX                       VARCHAR2(3)
 IOT_REDUNDANT_PKEY_ELIM          VARCHAR2(3)
 DROPPED                          VARCHAR2(3)
SQL>
SQL> --select * from all_indexes;
SQL>