php - 如何使用表单将 SQL 查询更改为仅显示特定范围内的注册日期？

Question

下面的代码是我目前所拥有的，如果有人知道 BETWEEN 的工作原理并能指出正确的方向，我将不胜感激。

<form action="index.php" method="GET">
    Starting from:<br>
    <input type="date" name="startDate" ><br><br>
    Upto:<br>
    <input type="date" name="uptoDate" ><br><br>
    <input type="submit"> 
</form>

<?php
    // I removed the connection details for obvious reasons
    // It does connect and display the data with no problems
    $startingFrom = $_GET[startDate];
    $upto = $_GET[uptoDate];

    // I tried this but it does not seem to work
    // $query = "SELECT * FROM table BETWEEN $startingFrom AND $upto"; 
    $query = "SELECT * FROM table"; 
    $result = mysql_query($query);

    echo "<table><th>Name</th><th>Registered Date</th>";

    while($row = mysql_fetch_array($result)){
        echo "<tr><td>" . $row['name'] . "</td><td>" . $row['registered'] . "</td></tr>"; 
    }
    echo "</table>"; 
    mysql_close(); 
?> 

Answer 1

如果您要在两个给定日期之间返回结果，请使用此代码

SELECT *
FROM table
WHERE date BETWEEN CAST('2015-04-03' AS DATE) AND CAST('2015-05-28' AS 
DATE);

对于包含日期的 BETWEEN，您需要使用 CAST() 将值转换为适当的数据类型，例如 DATE 或 DATETIME。如果您将 BETWEEN 与 DATETIME 一起使用，请将您的值转换为 DATETIME:

SELECT *
FROM table
WHERE date BETWEEN CAST('2015-04-03 08:40:09' AS DATETIME) AND CAST('2015-05-28 02:50:09' AS DATETIME);

作为旁注，使用 MySQL 改进的扩展 (mysqli) 并且您忘记关闭输入字段，这不是一个好的代码。