MySQL如何对此查询进行排序？

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

我试图按年和月订购，所以类似于：

• 11月11日
• 12月11日
• 1月12日
• ...

我该怎么做？

Answer 1

要订购您想要的商品，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' )

Answer 2

您可以在GROUP和ORDER BY子句中使用MySQL YEAR和MONTH：

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)。