Question

根据我今天关于这个主题的第一个问题（link），请再向我介绍一下。我有以下SQL结果：年，季度，月，周和值x值。目前，我每月给出数字1-4。但是，我现在想要花费多达52个连续数字，一个月只能花4个。

即，从以下结果：

year | quarter | month | week | value
2016 | 1       | 1     | 1    | 19738,5
2016 | 1       | 1     | 2    | 19738,5
2016 | 1       | 1     | 3    | 19738,5
2016 | 1       | 1     | 4    | 19738,5

这应该成为：

year | quarter | month | week | value
2016 | 1       | 1     | 1    | 19738,5
2016 | 1       | 1     | 2    | 19738,5
2016 | 1       | 1     | 3    | 19738,5
2016 | 1       | 1     | 4    | 19738,5
2016 | 1       | 2     | 5    | 19738,5
2016 | 1       | 2     | 6    | 19738,5
2016 | 1       | 2     | 7    | 19738,5
2016 | 1       | 2     | 8    | 19738,5

Zu diesem Zeitpunkt lautet die查询所以：

SELECT a.year, a.quarter, a.month, b.week AS week, sum(a.points) AS value
FROM
    TABLE AS a,
    (SELECT UNNEST(ARRAY[1, 2, 3, 4]) as week) AS b
GROUP BY
    year,
    quarter,
    month,
    week;

此外，遗憾的是，我没有任何想法，希望得到您的帮助。

Answer 1

据我了解，你有12条记录，一个月一个。而且没有日期时间可以提取月，季，周......

我通过将row_number()添加为周数来修改上一个答案。

请记住：

这不是真正的周数

它每个月除以4，这意味着每年48周。

select year, month, quarter,
           row_number() over (partition by year order by year,month,quarter) as week,
           value / 4 as week_value
    from t1,
        (SELECT UNNEST(ARRAY[1, 2, 3, 4])) b;

在此处查看：http://rextester.com/XUQRK94308

Answer 2

你可以将正在运行的一周绑定到正在运行的月份 - 如果在2月开始的一周它属于2月，不管它在3月结束，如果是这样，你可以JOIN就像这里：

t=# select
  wom "week of month", mn "month", wn "week", amount/max(wom) over(partition by mn)
from (
with
  weeks as (select generate_series('2016-01-01'::date,'2017-01-01'::date,'1 week'::interval) w)
, months as ( select generate_series('2016-01-01'::date,'2017-01-01'::date,'1 month'::interval) m)
select *, 78954 amount, dense_rank() over (partition by m order by w) wom, dense_rank() over (order by m) mn, dense_rank() over (order by w) wn
from weeks
join months on date_trunc('month',w) = m
) p
;
 week of month | month | week | ?column?
---------------+-------+------+----------
             1 |     1 |    1 |    15790
             2 |     1 |    2 |    15790
             3 |     1 |    3 |    15790
             4 |     1 |    4 |    15790
             5 |     1 |    5 |    15790
             1 |     2 |    6 |    19738
             2 |     2 |    7 |    19738
             3 |     2 |    8 |    19738
             4 |     2 |    9 |    19738
             1 |     3 |   10 |    19738
             2 |     3 |   11 |    19738
             3 |     3 |   12 |    19738
             4 |     3 |   13 |    19738
             1 |     4 |   14 |    15790
             2 |     4 |   15 |    15790
             3 |     4 |   16 |    15790
             4 |     4 |   17 |    15790
             5 |     4 |   18 |    15790
             1 |     5 |   19 |    19738
             2 |     5 |   20 |    19738
             3 |     5 |   21 |    19738
             4 |     5 |   22 |    19738
             1 |     6 |   23 |    19738
             2 |     6 |   24 |    19738
             3 |     6 |   25 |    19738
             4 |     6 |   26 |    19738
             1 |     7 |   27 |    15790
             2 |     7 |   28 |    15790
             3 |     7 |   29 |    15790
             4 |     7 |   30 |    15790
             5 |     7 |   31 |    15790
             1 |     8 |   32 |    19738
             2 |     8 |   33 |    19738
             3 |     8 |   34 |    19738
             4 |     8 |   35 |    19738
             1 |     9 |   36 |    15790
             2 |     9 |   37 |    15790
             3 |     9 |   38 |    15790
             4 |     9 |   39 |    15790
             5 |     9 |   40 |    15790
             1 |    10 |   41 |    19738
             2 |    10 |   42 |    19738
             3 |    10 |   43 |    19738
             4 |    10 |   44 |    19738
             1 |    11 |   45 |    19738
             2 |    11 |   46 |    19738
             3 |    11 |   47 |    19738
             4 |    11 |   48 |    19738
             1 |    12 |   49 |    15790
             2 |    12 |   50 |    15790
             3 |    12 |   51 |    15790
             4 |    12 |   52 |    15790
             5 |    12 |   53 |    15790
(53 rows)

Postgresql：用4行连续数字划分一行

2 个答案: