在mysql和php中按日期范围分组

Posted 2023-02-26

【中文标题】在mysql和php中按日期范围分组

【英文标题】：Group by date range in mysql and php

【发布时间】：2019-11-14 11:48:31

【问题描述】：

我有一个常规的帖子表，它有一个日期时间字段。我想获取特定日期范围内的帖子。

例如我希望在 Nov 10, 2019 和 Nov 13, 2019 之间创建的所有帖子作为一组帖子，以及在其他日期范围内创建的另一组帖子，例如在 Jan 1, 2019 和 Jan 15,2019 之间创建的帖子。

我想要的是这样的：

[
"Nov 10,2019-Nov 13,2019"  =>  [['id'=>1,'text'=>'something'],['id'=>2,'text'=>'something'],...],
"Jan 1,2019-Jan 15,2019"  =>  [['id'=>1,'text'=>'something'],['id'=>2,'text'=>'something'],...],
...
]

是否可以使用单个查询？

我知道我可以使用 GROUP BY DATE(dateTimeField) 之类的方式将它们组合在一起。

但是如何按日期范围对其进行分组？

编辑：我目前拥有的：

SELECT * FROM posts WHERE ( (datetime >= '2019-11-10 00:00:00' AND datetime <= '2019-11-13 23:59:59') OR (datetime >= '2019-01-01 00:00:00' AND datetime <= '2019-01-15 23:59:59')) LIMIT 0,50

这是我的查询，我知道我可以为此目的使用 BETWEEN，但我认为这不是问题。

问题是如何按这样的范围分组：

SELECT * FROM posts WHERE ( (datetime >= '2019-11-10 00:00:00' AND datetime <= '2019-11-13 23:59:59') OR (datetime >= '2019-01-01 00:00:00' AND datetime <= '2019-01-15 23:59:59')) LIMIT 0,50 GROUP BY THE_RANGE_SPECIFIED_IN_WHERE_CLAUSE

我不想要这个：

SELECT * FROM posts WHERE ( (datetime >= '2019-11-10 00:00:00' AND datetime <= '2019-11-13 23:59:59') OR (datetime >= '2019-01-01 00:00:00' AND datetime <= '2019-01-15 23:59:59')) LIMIT 0,50 date(datetime)

我不想根据每一天分开帖子，而是根据我指定的相同范围。

【问题讨论】：

这能回答你的问题吗？ mysql Query to group by date range?

dba.stackexchange.com/questions/205177/…

你能分享一下你正在尝试什么吗？

regular table for posts 是什么

@Strawberry 我的意思是一个带有文本字段和 id 以及 datetime 字段的典型表格

【参考方案1】：

假设您的表名为 TableX 并且包含发布日期的字段名为 post_date，请参见下表，其中包含 3 列：

+----+------------+-------------+
| id | post_date  | text        |
+----+------------+-------------+
|  1 | 2019-11-10 | xsomething  |
|  2 | 2019-11-10 | ysomething  |
|  3 | 2019-11-11 | ysomething  |
|  4 | 2019-11-12 | ysomething  |
|  5 | 2019-11-13 | xysomething |
|  6 | 2019-01-01 | xysomething |
|  7 | 2019-01-05 | xysomething |
|  8 | 2019-01-06 | ysomething  |
|  9 | 2019-01-10 | xsomething  |
| 10 | 2019-01-11 | ysomething  |
+----+------------+-------------+

要获取按日期范围分组的帖子，您将运行以下 php/MySQL 脚本：

//Query databases using CASE,THEN
$sql1 = "SELECT id AS post_id,text,post_date,  
    CASE 
        WHEN post_date BETWEEN '2019-11-10' AND  '2019-11-13' 
    THEN 1 
        WHEN post_date BETWEEN '2019-01-01' AND  '2019-01-15' 
    THEN 2 
        Else 1 END AS date_range_id FROM posts";
$sth = $con->prepare($sql1);
    $sth->execute();
    $sth->SetFetchMode(PDO::FETCH_ASSOC);
    while ($row=$sth->fetch())
        $date_range_id = $row['date_range_id'];

        if($date_range_id == 1)
            $post_id = $row['post_id'];
            $text = $row['text'];
            $post_date = $row['post_date'];

            $array[] = [$post_id,$text,$post_date];
        
        elseif($date_range_id == 2)
            $post_id = $row['post_id'];
            $text = $row['text'];
            $post_date = $row['post_date'];
            $array5[] = [$post_id,$text,$post_date];
        

    
$x= 1;
//create an associative array  $q of $array[]
foreach($array as $y => $z)
    $q[] = ['id' => $x++,
        'post_id'=>$z[0],
        'text' =>$z[1],
        'post_date' => $z[2]
];



//create an associative array $r of $array5[]
$l= 1;
foreach($array5 as $y => $z)
    $r[] = ['id' => $l++,
        'post_id'=>$z[0],
        'text' =>$z[1],
        'post_date' => $z[2]];


$post_range = [
    "'2019-11-10' AND '2019-11-13'" => $q,
    "'2019-01-01' AND '2019-01-11'" => $r];
echo "<pre>";print_r($post_range);echo "</pre>";

这将返回以下多维数组

Array
(
    ['2019-11-10' AND '2019-11-13'] => Array
        (
            [0] => Array
                (
                    [id] => 1
                    [post_id] => 1
                    [text] => xsomething
                    [post_date] => 2019-11-10
                )

            [1] => Array
                (
                    [id] => 2
                    [post_id] => 2
                    [text] => ysomething
                    [post_date] => 2019-11-10
                )

            [2] => Array
                (
                    [id] => 3
                    [post_id] => 3
                    [text] => ysomething
                    [post_date] => 2019-11-11
                )

            [3] => Array
                (
                    [id] => 4
                    [post_id] => 4
                    [text] => ysomething
                    [post_date] => 2019-11-12
                )

            [4] => Array
                (
                    [id] => 5
                    [post_id] => 5
                    [text] => xysomething
                    [post_date] => 2019-11-13
                )

        )

    ['2019-01-01' AND '2019-01-11'] => Array
        (
            [0] => Array
                (
                    [id] => 1
                    [post_id] => 6
                    [text] => xysomething
                    [post_date] => 2019-01-01
                )

            [1] => Array
                (
                    [id] => 2
                    [post_id] => 7
                    [text] => xysomething
                    [post_date] => 2019-01-05
                )

            [2] => Array
                (
                    [id] => 3
                    [post_id] => 8
                    [text] => ysomething
                    [post_date] => 2019-01-06
                )

            [3] => Array
                (
                    [id] => 4
                    [post_id] => 9
                    [text] => xsomething
                    [post_date] => 2019-01-10
                )

            [4] => Array
                (
                    [id] => 5
                    [post_id] => 10
                    [text] => ysomething
                    [post_date] => 2019-01-11
                )

        )

)

【讨论】：

实际上我没有问如何从 php 进行查询或如何在特定字段上使用 group by。我已经更新了这个问题。请看一看。

查看我编辑的答案@mohammadfallah.rasoulnejad。我希望这就是你要找的