Query Improvement

Hi,

I posted this about a week ago and am still having issues trying to improve this query.

This is a nasty query here which I'm hoping to make smaller by using some joins. I got help from here before, so while I'm trying to do it, I was hoping some others can look at it also.

Thank you,

      SELECT c.email || '|' || ca.first_name || '|' || ca.last_name ||
'|' || 'ZACKS' || '|' ||

         TO_CHAR(c.date_registered, 'mmddrr hh24:mi:ss') || '|' || TO_CHAR(TRUNC(SYSDATE-1),'MM-DD-YYYY') || '|' ||

         v.adid || '|' || cd.day_phone line, 'HOUSE' list_type
      FROM customer c, customer_account ca, visitor v,
subscr_email_product s, customer_address cd
      WHERE c.date_registered BETWEEN p_start_date AND p_end_date
      AND c.customer_id = ca.customer_id(+)
      AND c.customer_id = s.customer_id
      AND c.customer_id = v.customer_id
      AND c.customer_id = cd.customer_id(+)
      AND s.email_product_id = 'HL'
      AND email NOT IN (
       SELECT email
       FROM customer c, customer.subscriptions s, customer.product p,
customer_address ca, customer_account ct, visitor v
       WHERE ca.address_type_id = 1
         AND s.status = 1
         AND s.sell_rep_id IN (201, 202)
         AND p.produst_id = 1
         AND TRUNC(start_date) BETWEEN p_start_date AND p_end_date
         AND p.produst_id  = s.produst_id
         AND c.customer_id = s.customer_id
         AND c.customer_id = ca.customer_id
         AND c.customer_id = ct.customer_id
         AND c.customer_id = v.customer_id (+))
       UNION
      SELECT c.email || '|' || ca.first_name || '|' || ca.last_name ||


'|' || 'ZACKS' || '|' ||

         TO_CHAR(c.date_registered, 'mmddrr hh24:mi:ss') || '|' ||
TO_CHAR(TRUNC(SYSDATE-1),'MM-DD-YYYY') || '|' ||
         v.adid || '|' || cd.day_phone line, 'AMERITRADE' list_type
      FROM customer c, customer_account ca, visitor v,
subscr_email_product s, customer_address cd
      WHERE c.date_registered BETWEEN p_start_date AND p_end_date
      AND c.customer_id = ca.customer_id(+)
      AND c.customer_id = s.customer_id
      AND c.customer_id = v.customer_id
      AND c.customer_id = cd.customer_id(+)
      AND s.email_product_id = 'HL'
      AND email IN (
       SELECT email
       FROM customer c, customer.subscriptions s, customer.product p,
customer_address ca, customer_account ct, visitor v
       WHERE ca.address_type_id = 1
         AND s.status = 1
         AND s.sell_rep_id IN (201, 202)
         AND p.produst_id = 1
         AND TRUNC(start_date) BETWEEN p_start_date AND p_end_date
         AND p.produst_id  = s.produst_id
         AND c.customer_id = s.customer_id
         AND c.customer_id = ca.customer_id
         AND c.customer_id = ct.customer_id
         AND c.customer_id = v.customer_id (+));