您需要使用一个表进行外部联接，该表每个月包含一行。假设您没有这样的表，则可以使用硬编码的UNION查询即时创建它：
SELECT * FROM
(SELECT DATE_FORMAT(Now(), "%b") as Month
UNION
SELECT DATE_FORMAT(Now() - INTERVAL 1 MONTH), "%b")
UNION
SELECT DATE_FORMAT(Now() - INTERVAL 2 MONTH), "%b")
UNION
...
SELECT DATE_FORMAT(Now() - INTERVAL 11 MONTH), "%b")) AS Months
LEFT JOIN (SELECT DATE_FORMAT(drives.timestamp, "%b") AS Month,
drives.timestamp,
DATE_FORMAT(drives.timestamp, "%d-%m-%Y %H:%i:%s") AS Exact_date,
drives.departure,
drives.destination,
drives.route,
CONCAT(drivers.name, " ", drivers.surname) as driver,
drivers.id as driver_id
FROM drives, drivers WHERE drives.driver = drivers.id
AND drives.timestamp > DATE_SUB(Now(), INTERVAL 12 MONTH)) data
ON Months.Month = data.Month
ORDER BY data.timestamp
任何没有记录的月份NULL在数据列中都会有一行。
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