Detect the fields which are primary/foreign keys for each schema's tables

Question

Hello everybody,
I'd like to know if it's possible to select a field in one of the dictionary tables to identify the fields of a table which are PK or FK in this one. I'd like to do this to generate the fields that I need to put in a technical design.
Actually I have this (if it can help you to understand what I'd like to do) :
select table_name "Table name",
column_name "Physical field name",
case when data_type = 'NUMBER' then data_type || '(' || NVL(data_precision,0) || ',' || NVL(data_scale,0) || ')'
when data_type = 'VARCHAR2' then data_type || '(' || data_length || ')'
else data_type
end "Datatype",
case when nullable = 'Y' then 'FALSE'
when nullable = 'N' then 'TRUE'
end "Not null",
/* Here I'd like to retrieve TRUE or FALSE if the field to display is a primary key or not and the same for foreign keys*/
from all_tab_columns
where table_name in (select table_name
from all_tables
where table_name like '%project_name%'
and table_name not like '%TMP%');
Thanks a lot for your help,
Florent

Answer 1

Please investigate all_constraints and all_cons_colums.
http://download-west.oracle.com/docs/cd/B19306_01/server.102/b14237/toc.htm