从MySQL date_format中的％m和％d中删除前导零

Question

以下查询生成的日期类似于2016, 01, 02 。 如何从月份和日期中删除尾随零，以便它看起来像2016, 1, 2 ？

SELECT DATE_FORMAT(earning_created, '%Y, %m, %d') AS day, SUM(earning_amount) AS amount
FROM earnings
WHERE earning_account_id = ?
GROUP BY DATE(earning_created)
ORDER BY earning_created

Answer 1

您可以使用%c格式化月份而不使用前导零和%e来格式化月中的某一天：

SELECT   DATE_FORMAT(earning_created, '%Y, %c, %e') AS day, -- Here! 
         SUM(earning_amount) AS amount
FROM     earnings
WHERE    earning_account_id = ?
GROUP BY DATE(earning_created)
ORDER BY earning_created