mysql - 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订购，例如：

• 11 月 11 日
• 12月11日
• 1 月 12 日
• ...

我怎样才能做到这一点？

Answer 1

您可以使用 MySQLYEAR和MONTH内部的GROUPandORDER BY子句：

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)

您也可以替换DATE_FORMAT( DATE, '%y' )为YEAR(DATE)。

Answer 2

要订购您想要的东西，请使用ORDER BY：

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