Question

我正在尝试按月中的某天生成累计销售额（这样我就可以在同一个图表上绘制多个月的图表，在X轴上显示月份日期，在Y轴上显示累计金额总和），但是我左右加入generate_series（1,31），我得到了：

d   sum
1   3746.5
2   5731.5
3   9258.42

而我想要的是：

d   sum
1   3746.5
2   5731.5
3   9258.42
4   0
5   0
... 0
31  0

这是我的问题：

SELECT
    d,
    SUM (SUM("Amount")) OVER (ORDER BY "CloseDate" ASC)
FROM
    salesforce."Opportunity"
LEFT JOIN generate_series (1, 31) d ON d = EXTRACT (DAY FROM "CloseDate")
WHERE
    EXTRACT (MONTH FROM "CloseDate") = EXTRACT (MONTH FROM now())
AND EXTRACT (YEAR FROM "CloseDate") = EXTRACT (YEAR FROM now())
AND "StageName" = 'Closed Won'
AND "Type" = 'Renewal'
GROUP BY
    "CloseDate",
    d

我可以感觉到我做错了什么，但我不确定是什么。任何帮助将不胜感激 - 谢谢!!

Answer 1

右。您需要将聚合放在子查询中，首先从generate_series中选择，然后选择左连接：

WITH days as (
        select d from generate_series (1, 31) d),
    aggregates as (
        SELECT
            EXTRACT (DAY FROM "CloseDate") d,
            SUM (SUM("Amount")) OVER (ORDER BY "CloseDate" ASC) total
        FROM
            salesforce."Opportunity"
        WHERE
            EXTRACT (MONTH FROM "CloseDate") = EXTRACT (MONTH FROM now())
            AND EXTRACT (YEAR FROM "CloseDate") = EXTRACT (YEAR FROM now())
            AND "StageName" = 'Closed Won'
            AND "Type" = 'Renewal'
        GROUP BY
            "CloseDate"
     )
select days.d, aggregates.total
from days
left join aggregates on days.d = aggregates.d
order by days.d;

如果将group by放在子查询中然后将该子查询连接到几天，那么这是最简单和最可读的。您还可以添加更多子查询并将它们连接起来，以便在同一个表中包含更多聚合，甚至来自不同的源表。

在Postgres中的generate_series上加入提取（DATE的日期）

1 个答案: