要按时间戳字段按月份分组查询记录表，可以使用DATE_FORMAT函数将时间戳字段格式化为年月格式，然后将结果按照该字段进行分组。

SELECT a.month month,ifnull(b.count, 0) count FROM (SELECT 1 month UNION ALL SELECT 2 month UNION ALL SELECT 3 month UNION ALL SELECT 4 month UNION ALLSELECT 5 month UNION ALL SELECT 6 month UNION ALL SELECT 7 month UNION ALL SELECT 8 month UNION ALL SELECT 9 month UNION ALLSELECT 10 month UNION ALL SELECT 11 month UNION ALL SELECT 12 month) a LEFT JOIN(SELECT DATE_FORMAT(FROM_UNIXTIME(`create_time`), '%m') AS `month`, COUNT(*) AS `count`
FROM user_log
GROUP BY `month`) bON a.month=b.month ORDER BY month