#日期相差:datadiff，两个参数为时间类型
SELECT DATEDIFF('2019-2-28','2019-2-2');
SELECT DATEDIFF(MAX(hiredate),MIN(hiredate)) AS difference FROM employees;
SELECT DATEDIFF(NOW(),'2012-12-2') ;

文章名称：mysql日期相差datediff函数
地址分享：http://lswzjz.com/article/ijgcci.html