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  QUARTER CUSTOMER PRODUCT RETAIL_SALES_AMT WHOLESALE_AMT
  
  01/01/2006 ABC VACUUM CLEANER 454234,00 65633456.00
  01/04/2006 ABC VACUUM CLEANER 324562,00 45333234.00
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  the RETAIL_SALES_AMT. The method of calculation is provided for in:
  
  retail_sales_amt scheduled for 07/01/2006=.345+ ((01/07/2006 whole_sales-01/04/2006 whole_sales) / (01/04/2006 whole_sale)))
  * 01/04/2006 RETAIL_SALES_AMT and move forward to subsequent quarters.
  
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  Concerning
  
  Published by: user626688 on October 27, 2009 11:26
  
  Published by: user626688 on October 27, 2009 11:26
  
  Published by: user626688 on October 27, 2009 11:27
  
  Published by: user626688 on October 27, 2009 11:28
  
  Published by: user626688 on October 27, 2009 11:31
  
  Published by: user626688 on October 27, 2009 11:32

  Hello

  As far as I can tell, that's what you asked for:

  WITH     got_prev         AS
  (
       SELECT     table_x.*
       ,     LAG (wholesale_amt) OVER ( PARTITION BY  customer
                                      ,                product
                              ORDER BY      quarter
                             )     AS prev_wholesale_amt
       FROM     table_x
  --     WHERE     ...     -- Any filtering goes here
  )
  ,     tree     AS
  (
       SELECT     got_prev.*
       ,     SYS_CONNECT_BY_PATH ( CASE
                             WHEN  LEVEL = 1
                             THEN  retail_sales_amt
                             ELSE  ( .345
                                            + wholesale_amt
                                            - prev_wholesale_amt
                                ) / prev_wholesale_amt
                            END
                          , '*'
                          )                    AS path
       FROM     got_prev
       START WITH     retail_sales_amt     IS NOT NULL
       CONNECT BY     retail_sales_amt     IS NULL
            AND     quarter               = ADD_MONTHS (PRIOR quarter, 3)
            AND     customer          = PRIOR customer
            AND     product               = PRIOR product
  )
  SELECT       quarter
  ,       customer
  ,       product
  ,       COALESCE ( retail_sales_amt
               , eval_number ( LTRIM ( path
                                         , '*'
                             )       )
               )      AS retail_sales_amt
  ,       wholesale_amt
  ,       NVL2 ( retail_sales_amt
              , 'F'
              , 'T'
              )          AS projected_flag
  FROM       tree
  ORDER BY  customer
  ,            product
  ,       quarter
  ;
  

  I posted earlier the eval_number function.

  In this query, a group of consecutive quarters, where the first group a retail_sales_num and the rest of the members of the group are not, is treated as a hierarchy. The retail_sales_amt of all members (except the first) will be based on the previous, as well as the wholesale_amts past and present.
  Say that a tree is 5 points of time (as in your examples of data). We can calculate the 2nd point in several ways: using analytical functions, for example. But we cannot use the same formula to calculate the 3rd point, because the calculation of section 2 must be completed before we can calculate the 3rd. It goes the same for the 4th and 5th.
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