To find reference table of a table in oracle
select table_name, constraint_name, status, owner
from all_constraints
where r_owner = 'MAP'
and constraint_type = 'R'
and r_constraint_name in
(
select constraint_name from all_constraints
where constraint_type in ('P', 'U')
and table_name = 'TABLE_NAME'
and owner = 'MAP'
)
order by table_name, constraint_name

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