Question

您好我有两个日期from和to的文本框。当我在两个文本框中选择日期，表示时间间隔时，我想填写缺少的日期，这样我就可以在表中查询一些记录以及假设我有

的日期

或者可能是另一个约会，请帮帮我

<?php
$from='2014-08-11'; 
$to='2014-09-10';

$query="SELECT * FROM stats WHERE Feeddate BETWEEN '2014-08-11' AND '2014-09-10'"; 
?>

Answer 1

$from   = '2014-08-11'; 
$to     = '2014-09-10';
$query  = "SELECT Feeddate FROM stats WHERE Feeddate BETWEEN '$from' AND '$to' ORDER BY Feeddate";

$cursor = DateTime::createFromFormat('Y-m-d', $from);
$res    = mysql_query($query);

while ($row = mysql_fetch_assoc($res))
{
    $date = DateTime::createFromFormat('Y-m-d', $row['Feeddate']);
    while ($cursor != $date)
    {
        echo "Day is missing: " . $cursor->format('Y-m-d') . "<br>";
        $cursor->modify('+1 day');
    }
    $cursor->modify('+1 day');

}

Answer 2

没有测试它，但是这样的东西。您需要在要查找的范围内创建一系列日期的临时表。例如2014-08-11至2014-09-10。这有一种方法：

Generating a series of dates

然后你想要查询

SELECT *
FROM x
(
     SELECT date 
     FROM dateseries
     WHERE date BETWEEN '2014-08-11' AND '2014-09-10'
) as x
WHERE NOT IN ( 
    SELECT date 
    FROM stats
    WHERE Feeddate BETWEEN '2014-08-11' AND '2014-09-10'
);

希望你能得到这个想法。只要知道MySql在子查询优化中糟透了，所以您可能希望将该子查询移动到连接。

在php中找到丢失的日期

2 个答案: