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Query that generates the life cycle of product’s orders

I will like to produce a query which generates the life cycle of orders on the different products present in the company.
The order of the products for each item from when it was lunched in the market is available in Table 1. The product can start having orders from when it was lunched or there can be a month where orders were absent (AX1). Another possibility is that the product may start having orders some few months later from it was presented over the market.

The launch dates for each product are present in table 2
I will like to have for each product the monthly order from when it was launched under a common monthly timescale distribution. The monthly distribution is an incremental month distribution from the respective launched date to present date.
Month1 is the launched date each product, Month 2 is the second month from the launched date ( eg. AX1 200810, BY1 200910) and so on. The resultset I am expecting is in Table 3.
How can I achieve it

Product Date Order
AX1 200810 29
AX1 200812 13
AX1 200902 45
BY1 200909 5
BY1 200910 7
BY1 200911 3
BY1 200912 4
CZ1 201111 4
CZ1 201112 6
CZ1 201201 10
Table 1 Storical table of product orders

Product LaunchDate
AX1 200809
BY1 200909
CZ1 201110
Table 2 Launch dates of products

Product Month1 Month2 Month3 Month4
AX1 29 13 45
BY1 5 7 3 4
CZ1 4 6 10
Table 3 Product order's in life cycle

Database: Oracle 10g

MikeOM_DBA

Are you aware that you will potentially have 40 (forty) months is the header?

MAX(order_date) - MIN(launchdate) = 40 months.

Or do you only want the first 4 months = launch date + 3 months like this:

SQL> WITH Products (Product, Launchdate)
     AS (SELECT 'AX1', TO_DATE ( 200809, 'YYYYMM') FROM DUAL UNION
  2    3           SELECT 'BY1', TO_DATE ( 200909, 'YYYYMM') FROM DUAL UNION
  4           SELECT 'CZ1', TO_DATE ( 201110, 'YYYYMM') FROM DUAL)
  5     , Orders (Product, Order_Date, Ordernum)
  6       AS (SELECT 'AX1', TO_DATE ( 200810, 'YYYYMM'), 29 FROM DUAL UNION
  7           SELECT 'AX1', TO_DATE ( 200812, 'YYYYMM'), 13 FROM DUAL UNION
  8           SELECT 'AX1', TO_DATE ( 200902, 'YYYYMM'), 45 FROM DUAL UNION
  9           SELECT 'BY1', TO_DATE ( 200909, 'YYYYMM'),  5 FROM DUAL UNION
 10           SELECT 'BY1', TO_DATE ( 200910, 'YYYYMM'),  7 FROM DUAL UNION
 11           SELECT 'BY1', TO_DATE ( 200911, 'YYYYMM'),  3 FROM DUAL UNION
 12           SELECT 'BY1', TO_DATE ( 200912, 'YYYYMM'),  4 FROM DUAL UNION
 13           SELECT 'CZ1', TO_DATE ( 201111, 'YYYYMM'),  4 FROM DUAL UNION
 14           SELECT 'CZ1', TO_DATE ( 201112, 'YYYYMM'),  6 FROM DUAL UNION
 15           SELECT 'CZ1', TO_DATE ( 201201, 'YYYYMM'), 10 FROM DUAL)
 16  -- ---
 17  SELECT   Product
 18         , SUM ( DECODE (Mthb, 0, Ordernum, 0)) Launchdate
 19         , SUM ( DECODE (Mthb, 1, Ordernum, 0)) Month1
 20         , SUM ( DECODE (Mthb, 2, Ordernum, 0)) Month2
 21         , SUM ( DECODE (Mthb, 3, Ordernum, 0)) Month3
 22      FROM (SELECT P.*, O.Order_Date, O.Ordernum
 23                 , MONTHS_BETWEEN ( O.Order_Date, P.Launchdate) Mthb
 24              FROM Products P, Orders O
 25             WHERE O.Product = P.Product
 26               AND MONTHS_BETWEEN ( O.Order_Date, P.Launchdate) <= 3)
 27  GROUP BY Product
 28  ORDER BY Product
 29  /


PRODUCT   LAUNCHDATE     MONTH1     MONTH2     MONTH3
--------- ---------- ---------- ---------- ----------
AX1                0         29          0         13
BY1                5          7          3          4
CZ1                0          4          6         10

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diteps06

ASKER

There is no problem if there will be more than 40 months. The client is ready to expect it.

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MikeOM_DBA

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diteps06

ASKER

I think some modern reporting tools will do the pivot table.
The query is very good especially the expressions of nature:
SUM ( DECODE (Mthb, 1, Ordernum, 0)) Month1
Thanks