In oracle, how does one determine how many tables have foreign key associations?

In oracle, how does one determine how many tables have foreign key associations? There are two main steps:

Step 1:

// Query the table's primary key constraint name

Select * from user_constraints e where e. table_name =''

----- Enter the table name here

Step 2:

// Query all records that reference the primary key

Select B. table_name, B. column_name from user_constraints

Inner join user_cons_columns B

On a. constraint_name = B. constraint_name

Where a. r_constraint_name =''

----- Enter the constraint name of the table primary key just queried.