使用php从mysql获取% percentage

<?php
// 连接MySQL数据库
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";

$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接是否成功
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 查询数据库获取百分比
$sql = "SELECT COUNT(*) AS total_count, SUM(IF(column_name > 0, 1, 0)) AS positive_count FROM your_table";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    $row = $result->fetch_assoc();
    $total_count = $row["total_count"];
    $positive_count = $row["positive_count"];

    // 计算百分比
    $percentage = ($positive_count / $total_count) * 100;

    // 输出结果
    echo "百分比: " . $percentage . "%";
} else {
    echo "没有找到匹配的记录";
}

// 关闭数据库连接
$conn->close();
?>