我有一个常规的帖子表，它有一个日期时间字段。我想要获取特定日期范围内的帖子。
例如我希望将2019年11月10日和2019年11月13日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 2019 年 1 月 1 日 到 2019 年 1 月 15 日 之间。
我想要的是这样的东西:
[
"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'],...],
...
]
是否可以使用单个查询？
我知道我可以使用诸如GROUP BY DATE(dateTimeField)之类的方法将它们分组在一起。
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，我知道我可以使用 BETWEEN 来实现此目的，但我认为这不是问题。
问题是我如何按这样的范围进行分组:
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)
我不想根据每一天来分隔帖子，而是根据我指定的相同范围来分隔帖子。
最佳答案
假设您的表格名为 TableX，并且包含发布日期的字段名为 post_date，请参阅下表，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
)
)
)
关于php - mysql 和 php 中按日期范围分组，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/58856118/