Question

我正在尝试根据日期将查询结果存储到月表中（最近30天）。

2018年2月1日的例子： 给了我一个 310

的数量

SELECT *
FROM properties p
INNER JOIN orders o
  ON o.property_id = p.id
WHERE o.type = 'Order::PromotedListing'
  AND o.expired_at::DATE > '2018-02-01'
  AND o.created_at::DATE <= '2018-02-01'
ORDER BY o.updated_at

对于 2018年2月2日： 给了我一个 307 的计数

SELECT *
FROM properties p
INNER JOIN orders o
  ON o.property_id = p.id
WHERE o.type = 'Order::PromotedListing'
  AND o.expired_at::DATE > '2018-02-02'
  AND o.created_at::DATE <= '2018-02-02'
ORDER BY o.updated_at

等等。

我想根据临时表/ CTE中的日期存储过去30天的次数。像这样的东西 -

day, count
2018-02-01, 310
2018-02-02, 307
...
...

所以我提出了这个问题，但它没有做我想做的事情。

WITH monthly_dates AS (
  SELECT d.date as day
  FROM generate_series(current_date - interval '30 day',
                       current_date,
                       '1 day') AS d
),
featured_listings AS (
  SELECT o.expired_at::date, o.created_at::date, o.updated_at::date
  FROM properties p
  INNER JOIN orders o
    ON o.property_id = p.id
  WHERE o.type = 'Order::PromotedListing'
)
SELECT m.day, COUNT(*)
FROM monthly_dates AS m
LEFT JOIN featured_listings AS f
  ON m.day = f.updated_at
WHERE f.expired_at > m.day
 AND f.created_at <= m.day
GROUP BY 1
ORDER BY 1;

任何有关完成此任务的输入都将受到赞赏。

Answer 1

你似乎想要：

SELECT g.dte, count(o.property_id)
FROM generate_series('2018-02-01'::date, '2018-02-28'::date, interval '1 day'
                    ) g(dte) INNER JOIN
     orders o
     ON o.expired_at::DATE > g.dte AND o.created_at::DATE <= o.gte
GROUP BY g.dte
ORDER BY g.dte;

我认为您不需要此查询的properties表。

根据滚动月表中的日期存储查询结果

1 个答案: