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Home Backend Development PHP Tutorial php根据时间段查询每天的数据

php根据时间段查询每天的数据

Jun 23, 2016 pm 01:24 PM

现在需要查询给定的日期内的每天的数据,请教各位有没有什么好的办法?


回复讨论(解决方案)

首先数据库必须要有一个保存日期的字段,然后按日期分组统计即可。

首先数据库必须要有一个保存日期的字段,然后按日期分组统计即可。


你好,我的数据库保存的有unix时间戳形式的日期字段,现在是给定一个开始时间和结束时间,我要怎么才能分别查出每天的数据的?

时间戳分组比较麻烦,先用日期转换函数转成日期,然后再分组,不过这样效率较低,最好还是设计的时候增加一个日期字段。

能不能详细说下的,我还是不大明白哈!

你可以看看MYSQL的日期函数,比如你保存时间戳的字段为t
可以这样统计数据
SELECT COUNT(*) AS n,FROM_UNIXTIME(`t`,'%y-$m-%d') AS d FROM `tb` GROUP BY d ORDER BY d
不过这种效率很低,最好你插入的时候就计算好日期。

select id,FROM_UNIXTIME(timeField, '%Y%m%d') as time from tableName where FROM_UNIXTIME(timeField, '%Y%m%d')=20150920

你好,“插入的时候就计算好日期”指的是在数据库保存数据的时候就保存成如2015-10-08这种格式的日期吗?
我现在获取到的是一个时间段的开始时间和结束时间,是不是要先把这段时间按天保存到一个数组,然后按“每天”执行查询当天的数据的?

你好,“插入的时候就计算好日期”指的是在数据库保存数据的时候就保存成如2015-10-08这种格式的日期吗?
我现在获取到的是一个时间段的开始时间和结束时间,是不是要先把这段时间按天保存到一个数组,然后按“每天”执行查询当天的数据的?


是的,插入的时候就保存日期格式。
有开始时间和结束时间的话,查询的时候用大于小于比较符即可。如果数据量较大的话,每天写定时整理好存在一个新表中就快多了。

<?php ///$ary为该时间区间下所有的数据foreach($ary as $k=>$v){	$datas['day_'.date('md',$v['timestamp'])][]=$v;//分组		}var_dump($datas['day_0809'])//为8月9号那天所有数据;?>
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你好,“插入的时候就计算好日期”指的是在数据库保存数据的时候就保存成如2015-10-08这种格式的日期吗?
我现在获取到的是一个时间段的开始时间和结束时间,是不是要先把这段时间按天保存到一个数组,然后按“每天”执行查询当天的数据的?


是的,插入的时候就保存日期格式。
有开始时间和结束时间的话,查询的时候用大于小于比较符即可。如果数据量较大的话,每天写定时整理好存在一个新表中就快多了。


明白了,多谢哈!

<?php ///$ary为该时间区间下所有的数据foreach($ary as $k=>$v){	$datas['day_'.date('md',$v['timestamp'])][]=$v;//分组		}var_dump($datas['day_0809'])//为8月9号那天所有数据;?>
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3g油!

时间戳有时间戳的好处
用php来做数据整合就可以咯.

时间戳有时间戳的好处
用php来做数据整合就可以咯.


你好,我也是这样认为的,但是一直不太清楚什么情况用时间戳和日期格式比较合适!

PHP做数据整合适合小数据量,大数据太耗资源,如果你有100W数据需要占用多少内存多少带宽?一亿呢?

PHP做数据整合适合小数据量,大数据太耗资源,如果你有100W数据需要占用多少内存多少带宽?一亿呢?


怎么做才能最大程度的减少资源的消耗呢?

每种数据库的日期时间函数都是不一样的
如果你有升迁到大型或分布式数据库的打算时,则一定不能使用日期、时间类型字段
使用 unix 时间戳可免除绝大多数日期时间函数的烦恼

select *,from_unixtime(addtime, '%Y%m%d') as d from table where from_unixtime(addtime,'%Y%m%d')>=20150101 and from_unixtime(addtime,'%Y%m%d')<=20150201;

$d1 = strtotime('2015-01-01');
$d2 = strtotime('2015-02-01');
$sql = "select * from tbl_name where field between $d1 and $d2"

查询时没有了格式转换,自然效率要高很多

数据库存时间戳就挺好的 不用改 你查询的条件 可以把给的制定日期变成时间戳再去查库啊

多谢各位的回答,不但解决了我的问题还让我学到了更多的知识,非常感谢!!!

数据库存时间戳就挺好的 不用改 你查询的条件 可以把给的制定日期变成时间戳再去查库啊


数据库中保存的是时间戳,如果是要以每天为单位查询出一段时间每天的数据就不大方便了吧。
数据库表(时间字段应该是时间戳格式,为了便于显示直接写成date格式):
时间 | 种类 |   数量
2015-10-14 1      20 
2015-10-14 2      15 
2015-10-14 3      35 
2015-10-15 3      35 

要如下结果:
时间 | 销售种类总数
2015-10-14 3
2015-10-15 1

这没有什么

select 时间戳, sum(数量) from 表 group by floor(时间戳/86400)
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这没有什么

select 时间戳, sum(数量) from 表 group by floor(时间戳/86400)
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哇,还能这样用,受教了,多谢!!!
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