How to identify all the Oracle indexes created with the DESC clause

I like to identify all the indexes created with the descending clause. I like to re-create some of  these indexes with the asc clause  which is the default. I need to know all the indexes already created as Descending Indexes. Please help me identify this.
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Steve WalesSenior Database AdministratorCommented:
You can get that by querying dba_ind_columns:

SYS@demo> desc dba_ind_columns
 Name                                                                     Null?    Type
 ------------------------------------------------------------------------ -------- -------------------------------------------------
 INDEX_OWNER                                                              NOT NULL VARCHAR2(30)
 INDEX_NAME                                                               NOT NULL VARCHAR2(30)
 TABLE_OWNER                                                              NOT NULL VARCHAR2(30)
 TABLE_NAME                                                               NOT NULL VARCHAR2(30)
 COLUMN_NAME                                                                       VARCHAR2(4000)
 COLUMN_POSITION                                                          NOT NULL NUMBER
 COLUMN_LENGTH                                                            NOT NULL NUMBER
 CHAR_LENGTH                                                                       NUMBER
 DESCEND                                                                           VARCHAR2(4)

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Or, here's a point to the detailed description of this view from the docs:
DavidSenior Oracle Database AdministratorCommented:
SELECT index_owner, index_name, column_name
FROM dba_ind_columns
WHERE descend = 'DESC'

Note, use all_ind_columns for the current schema if you do not have access to the DBA views.

If you end up using the above statement as a subquery when you ALTER INDEX, there are lots of clear examples defining subqueries.

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