oracle get all FK and their tables

oracle-fk-research.sql

SELECT   uc.constraint_name||CHR(10)
||      '('||ucc1.TABLE_NAME||'.'||ucc1.column_name||')' constraint_source
,       'REFERENCES'||CHR(10)
||      '('||ucc2.TABLE_NAME||'.'||ucc2.column_name||')' references_column
FROM     user_constraints uc
,        user_cons_columns ucc1
,        user_cons_columns ucc2
WHERE    uc.constraint_name = ucc1.constraint_name
AND      uc.r_constraint_name = ucc2.constraint_name
AND      ucc1.POSITION = ucc2.POSITION -- Correction for multiple column primary keys.
AND      uc.constraint_type = 'R'
ORDER BY ucc1.TABLE_NAME
,        uc.constraint_name;