Not getting heading ouptut in sql

Question

Hi Experts,
  I am new to SQL. I am running a query that output should go to .csv file. But in output though data is coming, headings are not displayed. Following is my query.
I want heading in first line in my query output so that it will be easy to identify what column is what for.  I would like to know what I have to add/modify to get column headings in first line.
Really appreicate your help!!
set echo off
set concat ~
set pause off
set pagesize 0
set heading off
set feedback off
set verify off
set linesize 20000
set trimspool on
set trimout on
set termout off
set colsep ','
spool &1
select   '"' ||ORDER_ID    || '"' ||','||        
         '"' ||CREATED   || '"' ||','||        
         '"' ||STATUS     || '"' ||','||        
         '"' ||TITLE      || '"' ||','||        
         '"' ||FIRST_NAME     || '"' ||','||        
         '"' ||LAST_NAME        || '"' ||','||        
         '"' ||REQUESTED_PLAN        || '"' ||','||        
         '"' ||DEVICE        || '"' ||','||       
         '"' ||BILLING_POSTCODE  || '"'  
          from 
(SELECT 
'"' || replace(ORDERS.ORDER_NUMBER, '"', '""') || '"' as "ORDER_ID",                                                           
'"' || replace(ORDERS.CREATED, '"', '""') || '"' as "CREATED",
'"' || replace(ORDERS.STATUS, '"', '""') || '"' as "STATUS",    
'"' || replace(ORDERS.TITLE, '"', '""') || '"' as "TITLE",                                                   
'"' || replace(ORDERS.FIRST_NAME, '"', '""') || '"' as "FIRST_NAME",                                         
'"' || replace(ORDERS.LAST_NAME, '"', '""') || '"' as "LAST_NAME",  
'"' || replace(ORDERS.EMAIL, '"', '""') || '"' as "EMAIL",       
'"' || replace(ORDERS.REQUESTED_PLAN, '"', '""') || '"' as "REQUESTED_PLAN",  
'"' || replace(ORDERS.DEVICE, '"', '""') || '"' as "DEVICE",
'"' || replace(ORDERS.DELIVERY_POSTCODE, '"', '""') || '"' as "BILLING_POSTCODE" 
FROM TSO_TCOM_OWNER.ORDERS
WHERE ORDERS.CREATED BETWEEN to_date('16-MAR-13') AND CURRENT_DATE
AND (ORDERS.ORDER_NUMBER like 'BP%' OR ORDERS.ORDER_NUMBER like 'BO%'))
ORDER BY ORDERS.ID DESC
spool off
exit;

Answer 1

One way :
set echo off
set concat ~  
set pause off 
set pagesize 0  
set heading off  
set feedback off  
set verify off  
set linesize 20000  
set trimspool on  
set trimout on  
set termout off  
set colsep ',' 
spool &1
SELECT 'ORDER_ID','CREATED','STATUS','TITLE','FIRST_NAME','LAST_NAME','EMAIL','REQUESTED_PLAN','DEVICE','BILLING_POSTCODE' FROM DUAL;
<<<<<YOURQUERY>>>>>>  -- Paste your query here.
spool off
exit;
Cheers,
Manik.