Your colleague, John, has been struggling with a PL/SQL query that should display the Customer ID and the House Number, including the Materials used in the construction of the townhouses. John doesn’t...

Your colleague, John, has been struggling with a PL/SQL query that should display the Customer ID and the House Number, including the Materials used in the construction of the townhouses. John doesn’t seem to be able to determine why the query is not working and has asked for your
assistance.

Identify the errors and re‐write the correct code:

set serveroutput on
  c_id CUSTOMER.cust_id%Type;
  t TOWNHOUSE.house_num%Type;
  m_name MATERIALS.material_name%Type;
cursor info is
select cu.cust_id, t.house_num, m.material_name
from CUSTOMER cu, TOWNHOUSE t, MATERIALS m, PURCHASE_AGREEMENT pa
where cu.cust_id = pa.cust_id
and t.house_num = pa.house_num
and m.material_id = pa.material_id
begin
for rec in info
  c_id:=rec.cust_id;
  t:= rec.house_num;
  m_name:=rec.material_name;
  dbms_output_put_line('CUSTOMER ID:   ' || c_id || ', ' || chr(13) ||'HOUSE NUM:     ' || t ||
chr(13) || 'MATERIALS:     ' || m_name);
  dbms_output.put_line('‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐');
end loop;