MySQL 如何从 datetime 类型的字段选择 date

[donglongtu]

有个字段created_at是 datetime 类型，如何选择当天日期的数据？

SELECT * FROM data WHERE created_at = '2017-06-29';

SELECT * FROM data WHERE created_at BETWEEN '2017-06-29 00:00:00' AND '2017-06-29 23:59:59';

都不对，结果集都是空的

[revotu]

MySQL 时间处理相关函数 : http://www.revotu.com/mysql-date-and-time-functions.html


WHERE DATE(created_at) = '2017-06-29'

或是

WHERE created_at LIKE '2017-06-29%'

[mkeith]

是不是 between 不包含边界啊?你换成大于等于看看,楼上方法没法走索引吧