How to get information from Oracle's views

Question

Hi,
I need to get information from Oracle's views about:
* in which table's column is set index
* what type of index is on this column
* name of a trigger which exist on a table
* type of trigger (before, after etc)
* trigger status (enable, disable)
Thanks for help.

Answer 1

Hi..
One of the best way to know which views to use is doing select * from dict where table_name like 'xxx';
For example in your case you needed to know about the indexes and triggers so
SQL> select * from dictionary where table_name like 'DBA_IND%';
TABLE_NAME                     COMMENTS
DBA_INDEXES                    Description for all indexes in the database
*DBA_IND_COLUMNS                COLUMNs comprising INDEXes on all TABLEs and CLUSTERs*
DBA_IND_EXPRESSIONS            FUNCTIONAL INDEX EXPRESSIONs on all TABLES and CLUSTERS
DBA_INDEXTYPES                 All indextypes
DBA_INDEXTYPE_COMMENTS         Comments for user-defined indextypes
DBA_INDEXTYPE_ARRAYTYPES       All array types specified by the indextype
DBA_INDEXTYPE_OPERATORS        All indextype operators
DBA_IND_PARTITIONS
DBA_IND_SUBPARTITIONS
DBA_IND_STATISTICS             Optimizer statistics for all indexes in the database
10 rows selected.
SQL> select * from dictionary where table_name like 'DBA_TRI%';
TABLE_NAME                     COMMENTS
DBA_TRIGGERS                   All triggers in the database
DBA_TRIGGER_COLS               Column usage in all triggers
Reading the comments you can know which view to use, then  describe the view and use what you need