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;

tables-used