SQL

Question

我有一个包含两列的数据集，一个 ID 和一个日期时间

我正在尝试每个 ID 平均计数小时。

到目前为止，我已经设法使用此代码来计算一天的小时数：

SELECT id, DATE(created), DATE_PART(hour, created)::int AS "hour", --Counts 15 minute windows of activity FLOOR(DATE_PART(minute, created) / 15) AS "15 mins", (COUNT(*) OVER (PARTITION BY id, DATE(created)) / 4.0) AS "Online Hours" FROM --The temporary table I pulled the data into #tempres GROUP BY id, DATE(created), DATE_PART(hour, created), FLOOR(DATE_PART(minute, created) / 15) ORDER BY id DESC, DATE(created), "hour" ASC, "15 mins" ASC;

但我一直无法弄清楚如何在窗口函数上应用 AVG 以获得月度结果。

这个 Mockaroo link 应该产生与我正在使用的相同类型的数据。

我知道这可能不是最精简的起点，所以我对任何其他想法都持开放态度！

Answer 1

好的，所以我提出了一个主要是功能性的查询。

通过将旧查询放入 CTE，我能够运行在每月的时间段内对其进行平均聚合函数。

仍然对更清洁的选项持开放态度，但我想我会把我有的放在这里。

WITH cte AS (
    SELECT
        id,
        MAX(created) AS "created",
        DATE_PART(month,
            created) AS "month",
        DATE(created) AS "day",
        DATE_PART(hour,
            created)::int AS "hour",
        FLOOR(DATE_PART(minute,
                created) / 15) AS "15_mins",
        COUNT(id),
        (COUNT(*) OVER (PARTITION BY id,
                DATE(created)) / 4.0) AS "online_hours"
    FROM
        #tempres
    GROUP BY
        id,
        DATE_PART(month,
        created),
        DATE(created),
        DATE_PART(hour,
        created),
        FLOOR(DATE_PART(minute,
        created) / 15)
        ORDER BY
            id DESC,
            DATE(created),
            "hour" ASC,
            "15_mins" ASC
) SELECT
    id,
    DATE_PART(year, cte.created) AS "Year",
    cte.month,
    ROUND(AVG(online_hours), 2) AS "Average Hours"
FROM
    cte
GROUP BY
    id,
    DATE_PART(year, cte.created),
    cte.month
ORDER BY
    id,
    DATE_PART(year, cte.created),
    cte.month;

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