#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') ;
上一篇:M3DB集群安装笔记
下一篇:入门MySQL——备份与恢复