Please help to re-write this query using exists or with

Question

Hi please help to re-write this query using exists or with, i need to write same code for 45 day , 90 days and so on but sub query condition is same for all
SELECT SUM (DECODE (t_one_mon_c_paid_us, 0, 0, 1)) t_two_y_m_mul_ca_
FROM (SELECT SUM (one_mon_c_paid_us) t_one_mon_c_paid_us
FROM (
SELECT a.individual_id individual_id,
CASE
WHEN NVL
(b.ship_dt,
TO_DATE ('05-MAY-1955')
) >= SYSDATE - 45
AND a.country_cd = 'US'
AND b.individual_id in (
SELECT UNIQUE c.individual_id
FROM order c
WHERE c.prod_cd = 'A'
AND NVL (c.last_payment_dt,
TO_DATE ('05-MAY-1955')
) >= SYSDATE - 745)
THEN 1
ELSE 0
END AS one_mon_c_paid_us
FROM items b, addr a, product d
WHERE b.prod_id = d.prod_id
AND d.affinity_1_cd = 'ADH'
AND b.individual_id = a.individual_id)
GROUP BY individual_id)
Edited by: user4522368 on Aug 23, 2010 9:11 AM

Answer 1

Please try and place \ before and after you code \Could you not remove the inline column select with the following?
SELECT a.individual_id individual_id
     ,CASE
        when b.Ship_dt is null then
          3
        WHEN b.ship_dt >= SYSDATE - 90
          3
        WHEN b.ship_dt >= SYSDATE - 45
          2
        WHEN b.ship_dt >= SYSDATE - 30
          1
      END AS one_mon_c_paid_us
FROM  items           b
     ,addr            a
     ,product         d
     ,order           o
WHERE b.prod_id       = d.prod_id
AND   d.affinity_1_cd = 'ADH'
AND   b.individual_id = a.individual_id
AND   b.Individual_ID = o.Individual_ID
and   o.Prod_CD       = 'A'             
and   NVL (o.last_payment_dt,TO_DATE ('05-MAY-1955') ) >= SYSDATE - 745
and   a.Country_CD    = 'US'