mysql中between的边界,范围说明

mysql between的边界范围

between 的范围是包含两边的边界值

eg： id between 3 and 7 等价与 id >=3 and id<=7

not between 的范围是不包含边界值

eg：id not between 3 and 7 等价与 id < 3 or id>7

select * from `test` where id between 3 and 7;
等价于 select * from `test` where id>=3 and id<=7;
-----------------------------------------------------------
select * from `test` where id not between 3 and 7;
等价于 select * from `test` where id<3 or id>7;

mysql between日期边界的问题留意

边界问题：

mysql， between 开始日期 and 结束日期 包含开始日期，不包含结束日期

例如：

between '2018-01-22' and  '2018-01-30'

开始日期从2018-01-22 00:00:00.0 开始， 到2018-01-29 23:59:59.59结束

表中的create_date 是varchar(21) default null comment '时间',

create_date中保存值是： 年-月-日 时：分：秒：0 例如： 2018-01-29 23:45:35.0

select *  from  test  a where  a.create_date between '2018-01-22' and  '2018-01-30'   
order by a.create_date desc

select *  from tabel a where  a.create_date between '2018-01-22' and  '2018-01-30'   
order by a.create_date desc
    2018-01-29 23:45:35.0    20180129
    2018-01-29 23:45:33.0    20180129
    2018-01-29 00:10:58.0    20180129
    2018-01-29 00:10:45.0    20180129
    2018-01-28 23:42:23.0    20180128
    2018-01-28 23:39:39.0    20180128
select *  from tabel a where  a.create_date between '2018-01-22' and  '2018-01-29'   
order by a.create_date desc
    2018-01-28 23:42:23.0    20180128
    2018-01-28 23:39:39.0    20180128
    2018-01-28 00:13:22.0    20180128
    2018-01-28 00:13:19.0    20180128
    2018-01-27 23:23:02.0    20180127
    2018-01-22 00:09:59.0    20180122
    2018-01-22 00:09:56.0    20180122
    2018-01-22 00:01:53.0    20180122

遇到的其他问题：

遇到另外一张表 test2 有保存时间的字段： `reporttime` varchar(45) default null,

这个字段保存的值是：

例子1：

select *  from bips_hpd_helpdesk a where  str_to_date(from_unixtime(a.reporttime,'%y-%m-%d'),'%y-%m-%d') 
between '2018-01-16' and '2018-01-27' order by from_unixtime(a.reporttime,'%y-%m-%d') desc ;

结果1：

从结果中，可以看到取到了27号的数据，可能是处理的时间没有 小时，分钟，秒。

例子2：

select *  from bips_hpd_helpdesk a where  str_to_date(from_unixtime(a.reporttime,'%y-%m-%d'),'%y-%m-%d') 
between str_to_date('2018-01-16','%y-%m-%d') and str_to_date('2018-01-27','%y-%m-%d')

结果2：

找到问题： 毫秒值转换为时间，发现这里保存的毫秒值，没有保存时分秒：

from_unixtime(a.reporttime,'%y-%m-%d') as reporttime,a.reporttime,  
             str_to_date(from_unixtime(a.reporttime,'%y-%m-%d'),'%y-%m-%d %h:%i:%s') as reporttime22
        from test  a where  str_to_date(from_unixtime(a.reporttime,'%y-%m-%d'),'%y-%m-%d %h:%i:%s') 
        between str_to_date('2018-01-16','%y-%m-%d %h:%i:%s') and str_to_date('2018-01-27 %h:%i:%s','%y-%m-%d')
     #subdate(curdate(),date_format(curdate(),'%w')-1) and subdate(curdate(),date_format(curdate(),'%w')-8)
        order by from_unixtime(a.reporttime,'%y-%m-%d') desc ;

查看到的时间值：

以上为个人经验，希望能给大家一个参考，也希望大家多多支持。