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
1 2 3 4 5 | 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:
?1 | 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
?1 2 | select * from test a where a.create_date between '2018-01-22' and '2018-01-30' order by a.create_date desc |
?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | 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:
?1 2 | 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:
?1 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:
?1 2 3 4 5 6 | 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服务器之家。
原文链接:https://markix.blog.csdn.net/article/details/80365585
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