J'aimerais remercier Juan Carlos Oropeza pour avoir fourni un script et SQLFiddle avec les données de test. George, tu aurais dû faire ça.
La requête elle-même est plutôt simple.
Calculez d'abord une somme courante simple (CTE_RunningSum ) et divisez-le par 1,000,000 pour obtenir un nombre de millions entiers.
Calculez ensuite à nouveau la somme cumulée en partitionnant par le nombre de millions.
Violon SQL
J'ai inclus les colonnes RunningSum et Millions dans le résultat final pour illustrer le fonctionnement de la requête.
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;
Résultat
| 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 |
