MySQL 如何对这个查询进行排序？

Question

我有以下查询:

SELECT 
    DATE_FORMAT( DATE, '%M' ) AS MONTH,
    DATE_FORMAT( DATE, '%y' ) AS YEAR,
    DEVICE,
    COUNT( * ) AS cnt
FROM users
GROUP BY YEAR, MONTH, DEVICE

我正在尝试按年和月进行排序，例如:

• 11 月 11 日
• 12 月 11 日
• 1 月 12 日
• ...

我该怎么做？

Answer 1

您可以使用MySQL YEAR和 MONTH在 GROUP 和 ORDER BY 子句中:

SELECT
DATE_FORMAT( DATE, '%M' ) AS MONTH,
DATE_FORMAT( DATE, '%y' ) AS YEAR,
DEVICE,
COUNT( * ) AS cnt
FROM users
GROUP BY YEAR(DATE), MONTH(DATE), DEVICE
ORDER BY YEAR(DATE), MONTH(DATE)

您也可以将 DATE_FORMAT( DATE, '%y' ) 替换为 YEAR(DATE)。