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Oracle - Öka värde

Förutsatt att jag förstår ditt krav korrekt, här är ett sätt, som använder Tabibitosan-metoden att "gruppera" data baserat på påföljande null / not-null transaktions-id. När vi har den informationen kan vi sedan göra en villkorlig rad_nummer() baserat på om transaktions-id är null eller inte.

WITH sample_data AS (SELECT 253442 Invoice_Id, 23334 Customer_id, NULL Transaction_id, 1 seq FROM dual UNION ALL
                     SELECT 253443 Invoice_Id, 23334 Customer_id, NULL Transaction_id, 2 seq FROM dual UNION ALL
                     SELECT 253444 Invoice_Id, 23334 Customer_id, NULL Transaction_id, 3 seq FROM dual UNION ALL
                     SELECT 253445 Invoice_Id, 23334 Customer_id, 123 Transaction_id, 4 seq FROM dual UNION ALL
                     SELECT 1050646 Invoice_Id, 23334 Customer_id, 456 Transaction_id, 5 seq FROM dual UNION ALL
                     SELECT 8457065 Invoice_Id, 23334 Customer_id, 789 Transaction_id, 6 seq FROM dual UNION ALL
                     SELECT 9052920 Invoice_Id, 23334 Customer_id, NULL Transaction_id, 7 seq FROM dual UNION ALL
                     SELECT 9333044 Invoice_Id, 23334 Customer_id, NULL Transaction_id, 8 seq FROM dual UNION ALL
                     SELECT 9616743 Invoice_Id, 23334 Customer_id, NULL Transaction_id, 9 seq FROM dual UNION ALL
                     SELECT 9894491 Invoice_Id, 23334 Customer_id, NULL Transaction_id, 10 seq FROM dual UNION ALL
                     SELECT 10186697 Invoice_Id, 23334 Customer_id, NULL Transaction_id, 11 seq FROM dual UNION ALL
                     SELECT 10490938 Invoice_Id, 23334 Customer_id, NULL Transaction_id, 12 seq FROM dual UNION ALL
                     SELECT 10803986 Invoice_Id, 23334 Customer_id, 69709477 Transaction_id, 13 seq FROM dual UNION ALL
                     SELECT 11132317 Invoice_Id, 23334 Customer_id, 72103163 Transaction_id, 14 seq FROM dual UNION ALL
                     SELECT 11444923 Invoice_Id, 23334 Customer_id, NULL Transaction_id, 15 seq FROM dual)
-- end of mimicking your data in a "table" called sample_data
-- you wouldn't need this - you'd just select from your table directly in the sql below:
SELECT invoice_id,
       customer_id,
       transaction_id,
       seq,
       CASE WHEN transaction_id is not NULL THEN
                 row_number() OVER (PARTITION BY customer_id, grp ORDER BY seq)
            ELSE 0
       END carryover
FROM   (SELECT invoice_id,
               customer_id,
               transaction_id,
               seq,
               row_number() OVER (PARTITION BY customer_id ORDER BY seq)
                 - row_number() OVER (PARTITION BY customer_id, CASE WHEN transaction_id IS NULL THEN 0 ELSE 1 END ORDER BY seq) grp
        FROM   sample_data)
ORDER BY customer_id, seq;

INVOICE_ID CUSTOMER_ID TRANSACTION_ID        SEQ  CARRYOVER
---------- ----------- -------------- ---------- ----------
    253442       23334                         1          0
    253443       23334                         2          0
    253444       23334                         3          0
    253445       23334            123          4          1
   1050646       23334            456          5          2
   8457065       23334            789          6          3
   9052920       23334                         7          0
   9333044       23334                         8          0
   9616743       23334                         9          0
   9894491       23334                        10          0
  10186697       23334                        11          0
  10490938       23334                        12          0
  10803986       23334       69709477         13          1
  11132317       23334       72103163         14          2
  11444923       23334                        15          0

För ytterligare krav:

WITH sample_data AS (SELECT 253442 Invoice_Id, 23334 Customer_id, 0 Transaction_Count, 1 seq FROM dual UNION ALL
                     SELECT 253443 Invoice_Id, 23334 Customer_id, 0 Transaction_Count, 2 seq FROM dual UNION ALL
                     SELECT 253444 Invoice_Id, 23334 Customer_id, 1 Transaction_Count, 3 seq FROM dual UNION ALL
                     SELECT 253445 Invoice_Id, 23334 Customer_id, 1 Transaction_Count, 4 seq FROM dual UNION ALL
                     SELECT 1050646 Invoice_Id, 23334 Customer_id, 0 Transaction_Count, 5 seq FROM dual UNION ALL
                     SELECT 8457065 Invoice_Id, 23334 Customer_id, 0 Transaction_Count, 6 seq FROM dual UNION ALL
                     SELECT 9052920 Invoice_Id, 23334 Customer_id, 2 Transaction_Count, 7 seq FROM dual UNION ALL
                     SELECT 9333044 Invoice_Id, 23334 Customer_id, 1 Transaction_Count, 8 seq FROM dual UNION ALL
                     SELECT 9616743 Invoice_Id, 23334 Customer_id, 0 Transaction_Count, 9 seq FROM dual UNION ALL
                     SELECT 9894491 Invoice_Id, 23334 Customer_id, 0 Transaction_Count, 10 seq FROM dual UNION ALL
                     SELECT 10186697 Invoice_Id, 23334 Customer_id, 0 Transaction_Count, 11 seq FROM dual UNION ALL
                     SELECT 10490938 Invoice_Id, 23334 Customer_id, 0 Transaction_Count, 12 seq FROM dual UNION ALL
                     SELECT 10803986 Invoice_Id, 23334 Customer_id, 1 Transaction_Count, 13 seq FROM dual UNION ALL
                     SELECT 11132317 Invoice_Id, 23334 Customer_id, 1 Transaction_Count, 14 seq FROM dual UNION ALL
                     SELECT 11444923 Invoice_Id, 23334 Customer_id, 0 Transaction_Count, 15 seq FROM dual)
-- end of mimicking your data in a "table" called sample_data
-- you wouldn't need this - you'd just select from your table directly in the sql below:
SELECT invoice_id,
       customer_id,
       Transaction_Count,
       seq,
       SUM(transaction_count) OVER (PARTITION BY customer_id,
                                                 CASE WHEN Transaction_Count = 0 THEN 0 ELSE 1 END, 
                                                 grp
                                    ORDER BY seq) carryover
FROM   (SELECT invoice_id,
               customer_id,
               Transaction_Count,
               seq,
               row_number() OVER (PARTITION BY customer_id
                                  ORDER BY seq)
                 - row_number() OVER (PARTITION BY customer_id,
                                                   CASE WHEN Transaction_Count = 0 THEN 0 ELSE 1 END
                                      ORDER BY seq) grp
        FROM   sample_data)
ORDER BY customer_id, seq;

INVOICE_ID CUSTOMER_ID TRANSACTION_COUNT        SEQ  CARRYOVER
---------- ----------- ----------------- ---------- ----------
    253442       23334                 0          1          0
    253443       23334                 0          2          0
    253444       23334                 1          3          1
    253445       23334                 1          4          2
   1050646       23334                 0          5          0
   8457065       23334                 0          6          0
   9052920       23334                 2          7          2
   9333044       23334                 1          8          3
   9616743       23334                 0          9          0
   9894491       23334                 0         10          0
  10186697       23334                 0         11          0
  10490938       23334                 0         12          0
  10803986       23334                 1         13          1
  11132317       23334                 1         14          2
  11444923       23334                 0         15          0

Den använder ett mycket liknande koncept som den ursprungliga lösningen, förutom genom att lägga till kontrollen för noll eller icke-noll transaktionsantal i partitionen by-satsen i analytisk funktion final sum() behöver vi inte längre fallsatsen för att mata ut 0 eller summan .

Förhoppningsvis kan du berätta vilka justeringar jag var tvungen att göra - i princip måste kontrollerna för transaktions-id är null/inte null ändras till transaktionsantal =0/!=0, plus ändringen av row_number() till sum(transaction_count) plus den tidigare nämnda ändringen av partition by-klausulen. Jag är säker på att om du hade tänkt på det lite mer, skulle du ha kommit till samma slutsats, om du inte redan har gjort det! *{:-)




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