mysql中between的边界,范围说明-巨人网络通讯

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 id3 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：