How to know how many child tables are present for a parent table

hi all,
i created a table USERS in db user pavan (pavan.users (id primary key) ).
and child tables are may be in the same user pavan or in other users of database also.
for the other users i given relative grant permissions to access this USERS table and maintain relation to it.
now, my requirement is how to check the number of references to pavan.users.id
how many tables are dependent on it.
thanks in advance.
regards
pavan

Try this
select a.owner,
       a.constraint_name,
       a.column_name,
       a.table_name,
       c.table_name Referenced_table,
       d.column_name referenced_column
from
        all_cons_columns a,
        all_constraints b,
        all_constraints c,
        all_cons_columns d
where a.table_name=b.table_name
and a.constraint_name=b.constraint_name
and b.constraint_type='R'
and b.r_constraint_name=c.constraint_name
and c.constraint_name=d.constraint_name
and a.owner='PAVAN'
and c.table_name='USERS'
and d.column_name='ID'

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How to know how many child tables are present for a parent table

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