mysql计算某时间距离当前时间
MySQL是一个开源的关系型数据库管理系统，它支持多种数据存储引擎，其中最流行的引擎是InnoDB。在MySQL中，我们可以使用函数来计算某时间距离当前时间的差值。
例如，我们想要计算某篇文章发布时间距离当前时间的时间差，可以使用以下函数：
SELECT TIMESTAMPDIFF(SECOND, release_time, NOW()) AS diff_second, TIMESTAMPDIFF(MINUTE, release_time, NOW()) AS diff_minute, TIMESTAMPDIFF(HOUR, release_time, NOW()) AS diff_hour, TIMESTAMPDIFF(DAY, release_time, NOW()) AS diff_day, TIMESTAMPDIFF(MONTH, release_time, NOW()) AS diff_month, TIMESTAMPDIFF(YEAR, release_time, NOW()) as diff_year FROM article WHERE article_id = 1;
