Jag skulle vilja tacka Juan Carlos Oropeza för att han tillhandahållit ett manus och SQLFiddle med testdata. George, du borde ha gjort det.
Själva frågan är ganska enkel.
Beräkna först en enkel löpande summa (CTE_RunningSum ) och dividera det med 1,000,000 för att få ett antal hela miljoner.
Beräkna sedan den löpande summan igen med partitionering med antalet miljoner.
SQL Fiddle
Jag inkluderade kolumnerna RunningSum och Millions i slutresultatet för att illustrera hur frågan fungerar.
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;
Resultat
| 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 |