mysql 内联两个表，匹配月份

Question

我在 MySQL 中有两个 table，在同一个数据库中有两个 table。 table名称数据

| service   | count     | date | 
--------------------------------------
| bugss     | 375   | 2022-01-01 05:00:00.00000 
| fromsite  | 5     | 2022-02-01 05:00:00.00000 
| kbocetra  | 100   | 2022-01-05 07:00:00.00000

已尝试获取数据 table

SELECT SUM(`count`) AS Alertcount,
DATE_FORMAT(`date`, '%M') AS Month,
FROM data
GROUP BY DATE_FORMAT(`date`, '%Y-%m')

输出：

January  | 475
February | 5

另一个table名字pd

| group | minutes   | projdate | 
-------------------------------- 
gcp     | 145       | 2022-01-01 05:00:00.00000 
azure   | 10        | 2022-02-01 05:00:00.00000 
aws     | 80        | 2022-01-05 07:00:00.00000

我在下面的命令中尝试了单独的 tables，如下所示的 pd table ..输出为

SELECT SUM(`minutes`) AS Hours,
DATE_FORMAT(`group  `, '%M') AS Month
FROM pd
GROUP BY DATE_FORMAT(`group`, '%Y-%m')

输出：

January  | 225
February | 10

我希望输出如下所示，总计数将作为两个 tables count/minutes 的输出，即 475/225 和 5/10。请帮忙，我对内部声明很生气，但没有用。

Month	total
January	0.78
February	2

Answer 1

运行执行以下命令并查看结果。

SELECT
    a.`Month`,
    a.`Hours` / b.`Alertcount` as 'total'
FROM
    (
SELECT
    SUM( `minutes` ) AS Hours,
    DATE_FORMAT( `group  `, '%M' ) AS 'Month' 
FROM
    pd 
GROUP BY
    DATE_FORMAT( `group`, '%Y-%m' ) 
    ) a
    INNER JOIN (
SELECT
    SUM( `count` ) AS Alertcount,
    DATE_FORMAT( `date`, '%M' ) AS 'Month' 
FROM
DATA 
GROUP BY
    DATE_FORMAT( `date`, '%Y-%m' ) 
    ) b ON a.`Month` = b.`Month`

Answer 2

选择表格时，您可以使用除法运算符，如您所见here。

mysql 内联两个表，匹配月份

mysql inner join two tables with month matching

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