How to verify columns that made up an index

Question

hello,
the SQL statement:
select index_name,index_type,table_name,table_owner from dba_indexes where table_name=&table_name ; gives you indexes built on the table name.
But how can I find out ( sql statement) columns that made up an index?
thanks

Answer 1

The columns which make up an index can be queried from DBA_IND_COLUMNS.
For example:
select column_name from dba_ind_columns
where index_name = '<your-index-name>'
order by column_position;
The Oracle Data Dictionary is HUGE. When I'm looking for something and can't immediately recall the exact name of the view I need, I query DICT and get Oracle to give me a list of the likely views I need:
For example:
select table_name from dict where table_name like '%COLUMN%';
All the best,
SF.