按 mysql 和 php 中的日期范圍分組

Question

我有一個常規的帖子表，它有一個日期時間字段。 我想獲得特定日期范圍內的帖子。

例如，我希望在 2019 年 11 Nov 10, 2019 Nov 13, 2019之間創建的所有帖子作為一組帖子，以及在其他日期范圍（例如Jan 1, 2019 Jan 15,2019日之間）創建的另一組帖子。

我想要的是有這樣的東西：

[
"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'],...],
...
]

是否可以使用單個查詢？

我知道我可以使用GROUP BY DATE(dateTimeField)之類的東西將它們組合在一起。

但是如何按日期范圍對其進行分組？

編輯：我目前擁有的：

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

這是我的查詢，我知道我可以為此目的使用BETWEEN ，但我認為這不是問題所在。

問題是我如何按這樣的范圍分組：

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

我不想要這個：

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)

我不想根據每一天分開帖子，而是根據我指定的相同范圍。

Answer 1

假設您的表名為TableX並且包含發布日期的字段名為post_date請參見下表，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  |
+----+------------+-------------+

要獲取按日期范圍分組的帖子，您將運行以下 PHP/MySQL 腳本：

//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>";

這將返回以下多維數組

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
                )

        )

)