mysql 时间范围

- 查询今天的数据

select * from `user` where to_days(birthday) = to_days(CURDATE());

-- 查询昨天的数据

select * from `user` where to_days(CURDATE()) - to_days(birthday)<=1;

-- 查询最近7天的数据

select * from `user` where birthday > DATE_SUB(CURDATE(),INTERVAL 7 DAY);

-- 查询最近一个季度的数据

select * from `user` where birthday > DATE_SUB(CURDATE(), INTERVAL 3 MONTH)

-- 最近一年的数据

select * from `user` where birthday > DATE_SUB(CURDATE(), INTERVAL 1 YEAR);

 

-- 本季度的数据

select * from `user` where quarter(birthday) = quarter(CURDATE());

-- 上季度的数据

select * from `user` where quarter(birthday) = quarter(DATE_SUB(CURDATE(), INTERVAL 1 QUARTER));

 

-- 查询今年的数据

select * from `user` where year(CURDATE()) - year(birthday) = 28 ;

 

-- 查询第几月的数据

select * from `user` where month(birthday) = 8 ;

 

-- 查询某年某月某日的数据

select * from `user` where date_format(birthday,'%Y-%m-%d')='2017-07-07';

 

-- 查询制定时间段内的数据（只写到月，会出错）

select * from `user` where birthday between '1888-5-1 00:00:00' and '2017-9-3 00:00:00';

 

-- 查询制定时间段内的数据（只写到月，会出错）

select * from `user` where birthday > '1989-5-1' and birthday < '2017-5-1';

mysql日期与字符串转换函数

字符串转日期：STR_TO_DATE('2019-07-25 00:00:33', '%Y-%m-%d %H:%i:%s')  ，走索引

日期转字符串：DATE_FORMAT('2019-07-25 00:00:33', '%Y-%m-%d %H:%i:%s')，不走索引

方式一、between...and（推荐）

SELECT * FROM k_student WHERE create_time  between '2019-07-25 00:00:33' and '2019-07-25 00:54:33'

方式二、大小于号

SELECT * FROM k_student WHERE create_time >= '2019-07-25 00:00:33' AND create_time <= '2019-07-25 00:54:32'

方式三、转换为UNIX_TIMESTAMP比较，create_time若加了索引，不走索引 

SELECT * FROM k_student WHERE  UNIX_TIMESTAMP(create_time)  between UNIX_TIMESTAMP('2019-07-25 00:00:33') and UNIX_TIMESTAMP('2019-07-25 00:54:33')