Question

我试图计算表格中包含的时间序列的移动平均线（7天和30天）：＆＃39; mass＆＃39;字段：＆＃39; date＆＃39;，＆＃39; time＆＃39;和＆＃39; lbs＆＃39;。

虽然我怀疑这不是理想的MySQL，但以下代码可以生成一个包含每个日期正确值的正确临时表（＆＃39; mov＆＃39;）。

CREATE TEMPORARY TABLE IF NOT EXISTS mov
(   date DATE NOT NULL PRIMARY KEY,
    lbs FLOAT(12),
    ma7d FLOAT(12),
    ma30d FLOAT(12)
) AS

# Calculates moving averages
SELECT t1.date, t1.lbs,
( SELECT SUM(t2.lbs) / COUNT(t2.lbs) FROM mass AS t2 
WHERE DATEDIFF(t1.date, t2.date) BETWEEN 0 AND 6 ) AS 'ma7d', 
( SELECT SUM(t2.lbs) / COUNT(t2.lbs) FROM mass AS t2 
WHERE DATEDIFF(t1.date, t2.date) BETWEEN 0 AND 29 ) AS 'ma30d' 
FROM mass AS t1;

SELECT * FROM mov
GROUP BY date
ORDER BY date;

我的基本问题（我刚开始学习MySQL！）是：我现在如何插入＆＃39; ma7d＆＃39;并且＆＃39; ma30d＆＃39;值为原始表格中的相应日期＆＃39;质量＆＃39;？

我的目标是定期运行此脚本，以更新“＃mass”。随着新数据的添加。

非常感谢。

MySQL移动平均值的时间序列

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