Làm cách nào để đặt lại SUM đang chạy sau khi nó đạt đến một ngưỡng?

Tôi muốn cảm ơn Juan Carlos Oropeza đã cung cấp một tập lệnh và SQLFiddle với dữ liệu thử nghiệm. George, bạn nên làm điều đó.

Bản thân truy vấn nó khá đơn giản.

Lúc đầu, hãy tính một tổng chạy đơn giản (CTE_RunningSum ) và chia nó cho 1,000,000 để có được con số hàng triệu.

Sau đó, tính toán lại tổng đang chạy với phân vùng theo số hàng triệu.

SQL Fiddle

Tôi đã bao gồm các cột RunningSum và Millions trong kết quả cuối cùng để minh họa cách hoạt động của truy vấn.

WITH
CTE_RunningSum
AS
(
  SELECT 
    ID
    ,day_t
    ,collect
    ,SUM(collect) OVER(ORDER BY day_t, id) AS RunningSum
    ,(SUM(collect) OVER(ORDER BY day_t, id)) / 1000000 AS Millions
  FROM myTable
)
SELECT
  ID
  ,day_t
  ,collect
  ,RunningSum
  ,Millions
  ,SUM(collect) OVER(PARTITION BY Millions ORDER BY day_t, id) AS Result
FROM CTE_RunningSum
ORDER BY day_t, id;

Kết quả

|  id |                       day_t | collect | runningsum | millions |  result |
|-----|-----------------------------|---------|------------|----------|---------|
|  90 |     March, 11 2015 00:00:00 |   69880 |      69880 |        0 |   69880 |
|  13 |     March, 25 2015 00:00:00 |   69484 |     139364 |        0 |  139364 |
|  49 |     March, 27 2015 00:00:00 |   57412 |     196776 |        0 |  196776 |
|  41 |     March, 30 2015 00:00:00 |   56404 |     253180 |        0 |  253180 |
|  99 |     April, 03 2015 00:00:00 |   59426 |     312606 |        0 |  312606 |
|   1 |     April, 10 2015 00:00:00 |   65825 |     378431 |        0 |  378431 |
| 100 |     April, 27 2015 00:00:00 |   60884 |     439315 |        0 |  439315 |
|  50 |       May, 11 2015 00:00:00 |   39641 |     478956 |        0 |  478956 |
|  58 |       May, 11 2015 00:00:00 |   49759 |     528715 |        0 |  528715 |
|  51 |       May, 17 2015 00:00:00 |   32895 |     561610 |        0 |  561610 |
|  15 |       May, 19 2015 00:00:00 |   50847 |     612457 |        0 |  612457 |
|  66 |       May, 29 2015 00:00:00 |   66332 |     678789 |        0 |  678789 |
|   4 |      June, 04 2015 00:00:00 |   46891 |     725680 |        0 |  725680 |
|  38 |      June, 09 2015 00:00:00 |   64732 |     790412 |        0 |  790412 |
|  79 |      June, 14 2015 00:00:00 |   62843 |     853255 |        0 |  853255 |
|  37 |      June, 28 2015 00:00:00 |   54315 |     907570 |        0 |  907570 |
|  59 |      June, 30 2015 00:00:00 |   34885 |     942455 |        0 |  942455 |
|  71 |      July, 08 2015 00:00:00 |   46440 |     988895 |        0 |  988895 |
|  31 |      July, 10 2015 00:00:00 |   39649 |    1028544 |        1 |   39649 |
|  91 |      July, 12 2015 00:00:00 |   65048 |    1093592 |        1 |  104697 |
|  57 |      July, 14 2015 00:00:00 |   60394 |    1153986 |        1 |  165091 |
|  98 |      July, 20 2015 00:00:00 |   34481 |    1188467 |        1 |  199572 |
|   3 |      July, 26 2015 00:00:00 |   58672 |    1247139 |        1 |  258244 |
|  95 |    August, 19 2015 00:00:00 |   52393 |    1299532 |        1 |  310637 |
|  74 |    August, 20 2015 00:00:00 |   37972 |    1337504 |        1 |  348609 |
|  20 |    August, 27 2015 00:00:00 |   36882 |    1374386 |        1 |  385491 |
|   2 | September, 07 2015 00:00:00 |   39408 |    1413794 |        1 |  424899 |
|  14 | September, 09 2015 00:00:00 |   40234 |    1454028 |        1 |  465133 |
|   6 | September, 17 2015 00:00:00 |   65957 |    1519985 |        1 |  531090 |
|  93 | September, 29 2015 00:00:00 |   47213 |    1567198 |        1 |  578303 |
|  35 | September, 30 2015 00:00:00 |   49446 |    1616644 |        1 |  627749 |
|  86 |   October, 11 2015 00:00:00 |   34291 |    1650935 |        1 |  662040 |
|  75 |   October, 12 2015 00:00:00 |   31448 |    1682383 |        1 |  693488 |
|  19 |   October, 14 2015 00:00:00 |   48509 |    1730892 |        1 |  741997 |
|  56 |   October, 26 2015 00:00:00 |   30072 |    1760964 |        1 |  772069 |
|  48 |   October, 28 2015 00:00:00 |   58527 |    1819491 |        1 |  830596 |
|  40 |  November, 05 2015 00:00:00 |   67293 |    1886784 |        1 |  897889 |
|  33 |  November, 09 2015 00:00:00 |   41944 |    1928728 |        1 |  939833 |
|  34 |  November, 11 2015 00:00:00 |   35516 |    1964244 |        1 |  975349 |
|  85 |  November, 20 2015 00:00:00 |   43920 |    2008164 |        2 |   43920 |
|  18 |  November, 23 2015 00:00:00 |   44925 |    2053089 |        2 |   88845 |
|  62 |  December, 24 2015 00:00:00 |   34678 |    2087767 |        2 |  123523 |
|  67 |  December, 25 2015 00:00:00 |   35323 |    2123090 |        2 |  158846 |
|  81 |  December, 28 2015 00:00:00 |   37071 |    2160161 |        2 |  195917 |
|  54 |   January, 02 2016 00:00:00 |   32330 |    2192491 |        2 |  228247 |
|  70 |   January, 06 2016 00:00:00 |   47875 |    2240366 |        2 |  276122 |
|  28 |   January, 23 2016 00:00:00 |   40250 |    2280616 |        2 |  316372 |
|  65 |   January, 25 2016 00:00:00 |   49404 |    2330020 |        2 |  365776 |
|  73 |   January, 26 2016 00:00:00 |   65879 |    2395899 |        2 |  431655 |
|   5 |  February, 05 2016 00:00:00 |   53953 |    2449852 |        2 |  485608 |
|  32 |  February, 11 2016 00:00:00 |   44988 |    2494840 |        2 |  530596 |
|  53 |  February, 25 2016 00:00:00 |   68948 |    2563788 |        2 |  599544 |
|  83 |     March, 11 2016 00:00:00 |   47244 |    2611032 |        2 |  646788 |
|   8 |     March, 25 2016 00:00:00 |   51809 |    2662841 |        2 |  698597 |
|  82 |     March, 25 2016 00:00:00 |   66506 |    2729347 |        2 |  765103 |
|  88 |     April, 06 2016 00:00:00 |   69288 |    2798635 |        2 |  834391 |
|  89 |     April, 14 2016 00:00:00 |   43162 |    2841797 |        2 |  877553 |
|  52 |     April, 23 2016 00:00:00 |   47772 |    2889569 |        2 |  925325 |
|   7 |     April, 27 2016 00:00:00 |   33368 |    2922937 |        2 |  958693 |
|  84 |     April, 27 2016 00:00:00 |   57644 |    2980581 |        2 | 1016337 |
|  17 |       May, 17 2016 00:00:00 |   35416 |    3015997 |        3 |   35416 |
|  61 |       May, 17 2016 00:00:00 |   64603 |    3080600 |        3 |  100019 |
|  87 |      June, 07 2016 00:00:00 |   41865 |    3122465 |        3 |  141884 |
|  97 |      June, 08 2016 00:00:00 |   64982 |    3187447 |        3 |  206866 |
|  92 |      June, 15 2016 00:00:00 |   58684 |    3246131 |        3 |  265550 |
|  23 |      June, 26 2016 00:00:00 |   46147 |    3292278 |        3 |  311697 |
|  46 |      June, 30 2016 00:00:00 |   61921 |    3354199 |        3 |  373618 |
|  94 |      July, 03 2016 00:00:00 |   55535 |    3409734 |        3 |  429153 |
|  60 |      July, 07 2016 00:00:00 |   63607 |    3473341 |        3 |  492760 |
|  45 |      July, 20 2016 00:00:00 |   51965 |    3525306 |        3 |  544725 |
|  96 |      July, 20 2016 00:00:00 |   46684 |    3571990 |        3 |  591409 |
|  29 |    August, 09 2016 00:00:00 |   37707 |    3609697 |        3 |  629116 |
|  69 |    August, 11 2016 00:00:00 |   37194 |    3646891 |        3 |  666310 |
|  80 |    August, 19 2016 00:00:00 |   62673 |    3709564 |        3 |  728983 |
|  36 |    August, 28 2016 00:00:00 |   48237 |    3757801 |        3 |  777220 |
|  39 |    August, 29 2016 00:00:00 |   48159 |    3805960 |        3 |  825379 |
|  25 |    August, 30 2016 00:00:00 |   60958 |    3866918 |        3 |  886337 |
|  68 | September, 04 2016 00:00:00 |   50167 |    3917085 |        3 |  936504 |
|  55 | September, 08 2016 00:00:00 |   31193 |    3948278 |        3 |  967697 |
|  64 | September, 10 2016 00:00:00 |   31157 |    3979435 |        3 |  998854 |
|  42 | September, 14 2016 00:00:00 |   52878 |    4032313 |        4 |   52878 |
|  43 | September, 15 2016 00:00:00 |   54728 |    4087041 |        4 |  107606 |
|  77 | September, 18 2016 00:00:00 |   65320 |    4152361 |        4 |  172926 |
|  12 | September, 23 2016 00:00:00 |   43597 |    4195958 |        4 |  216523 |
|  30 | September, 26 2016 00:00:00 |   32764 |    4228722 |        4 |  249287 |
|  10 | September, 27 2016 00:00:00 |   47038 |    4275760 |        4 |  296325 |
|  47 |   October, 08 2016 00:00:00 |   46280 |    4322040 |        4 |  342605 |
|  26 |   October, 10 2016 00:00:00 |   69487 |    4391527 |        4 |  412092 |
|  63 |   October, 30 2016 00:00:00 |   49561 |    4441088 |        4 |  461653 |
|  78 |  November, 15 2016 00:00:00 |   40138 |    4481226 |        4 |  501791 |
|  27 |  November, 27 2016 00:00:00 |   57378 |    4538604 |        4 |  559169 |
|  21 |  December, 01 2016 00:00:00 |   35336 |    4573940 |        4 |  594505 |
|  16 |  December, 03 2016 00:00:00 |   39671 |    4613611 |        4 |  634176 |
|  22 |  December, 13 2016 00:00:00 |   34574 |    4648185 |        4 |  668750 |
|  72 |   January, 29 2017 00:00:00 |   55084 |    4703269 |        4 |  723834 |
|  44 |   January, 30 2017 00:00:00 |   36742 |    4740011 |        4 |  760576 |
|  24 |  February, 01 2017 00:00:00 |   31061 |    4771072 |        4 |  791637 |
|  76 |  February, 12 2017 00:00:00 |   35059 |    4806131 |        4 |  826696 |
|   9 |  February, 27 2017 00:00:00 |   39767 |    4845898 |        4 |  866463 |
|  11 |  February, 28 2017 00:00:00 |   66007 |    4911905 |        4 |  932470 |