How can I find the underlying column and table name for an Oracle view?

Question

This sounds like it should be simple to do but not so! There is no Oracle (meta-data) view that I can find that gives the underlying column and table name for an Oracle view col

Answer 1

Tables used to created the view can be selected using the query:

select 
  name , 
  type , 
  referenced_name , 
  referenced_type
from 
  user_dependencies 
where 
  name = 'VIEW_NAME' and 
  type = 'VIEW' and  
  referenced_type = 'TABLE';

If view columns have the same column name of table column, then please try the below query:

select 
  distinct table_name, column_name 
from 
  all_tab_columns 
where table_name in (select
                        referenced_name
                      from 
                        user_dependencies 
                      where 
                        name = 'VIEW_NAME' and 
                        type = 'VIEW' and  
                        referenced_type = 'TABLE') 
 and column_name in (select 
                        column_name 
                     from 
                        all_tab_columns 
                     where 
                        table_name = 'VIEW_NAME');