Mysql 根据带有分钟时间戳的行获取每小时平均金额
我的表结构如下所示:Mysql 根据带有分钟时间戳的行获取每小时平均金额,mysql,sql,database,Mysql,Sql,Database,我的表结构如下所示: +---------+------------+----------+---------+-----------+------------+ | id | account_id | hashrate | workers | sharerate | timestamp | +---------+------------+----------+---------+-----------+------------+ | 1227368 | 42 |
+---------+------------+----------+---------+-----------+------------+
| id | account_id | hashrate | workers | sharerate | timestamp |
+---------+------------+----------+---------+-----------+------------+
| 1227368 | 42 | 405211 | 1 | 6183 | 1534264380 |
| 1227367 | 12 | 450077 | 1 | 6868 | 1534264380 |
+---------+------------+----------+---------+-----------+------------+
每分钟为具有活动工作线程的用户创建一行
我试图显示一个图表,显示24小时内每小时的平均hashrate和sharerate
到目前为止,我的sql查询是:
SELECT
timestamp,
SUM(hashrate) as hashes,
SUM(sharerate) AS shares
FROM statistics_users
WHERE FROM_UNIXTIME(timestamp) >= DATE_SUB(NOW(), INTERVAL 1 DAY)
GROUP BY timestamp;
返回:
+------------+------------+----------+
| timestamp | hashes | shares |
+------------+------------+----------+
| 1534177980 | 2282744244 | 34831913 |
返回1440个对象(每天每分钟一个)。我想按小时对项目进行分组,并将分钟查询返回的所有总和平均为一小时。我不知道该从这里走到哪里,而且我对编写sql查询还相当陌生,因此非常感谢您的帮助。我们可以使用一个表达式,返回小时表示,基本上减少分和秒,然后按该表达式分组。一种可能是使用MySQL
DATE\u格式
函数
SELECT DATE_FORMAT(FROM_UNIXTIME(t.timestamp),'%Y-%m-%d %H') AS ts_hr
, AVG(t.hashes)
, AVG(t.shares)
FROM (
-- original query goes here as inline view
SELECT timestamp
, SUM(hashrate) as hashes
, SUM(sharerate) AS shares
FROM statistics_users
WHERE FROM_UNIXTIME(timestamp) >= NOW() + INTERVAL -1 DAY
GROUP BY timestamp
) t
GROUP
BY DATE_FORMAT(FROM_UNIXTIME(t.timestamp),'%Y-%m-%d %H')
-- ^^^^^^^^^^^^ ^^^^^^^^^^^^^^^
注意WHERE子句中的条件不考虑小时边界,所以我们将得到第一个小时的部分结果,以及最后一个小时的部分结果
规范不清楚,我们是想要每个时间戳的总和的平均值,还是更简单地说
SELECT DATE_FORMAT(FROM_UNIXTIME(t.timestamp),'%Y-%m-%d %H') AS ts_hr
, AVG(t.hashrate)
, AVG(t.sharerate)
FROM statistics_users t
WHERE FROM_UNIXTIME(t.timestamp) >= NOW() + INTERVAL -1 DAY
GROUP
BY DATE_FORMAT(FROM_UNIXTIME(t.timestamp),'%Y-%m-%d %H')
-- ^^^^^^^^^^^^ ^^^^^^^^^^^^^^^
尝试类似于
按小时分组(时间戳)代码>请参阅: