php中使用mysql的视图

<?php
// 连接到MySQL数据库
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database_name";

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

if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 创建视图
$sql = "CREATE VIEW employee_view AS
        SELECT id, name, department
        FROM employees
        WHERE department = 'Sales'";

if ($conn->query($sql) === TRUE) {
    echo "视图创建成功";
} else {
    echo "错误: " . $sql . "<br>" . $conn->error;
}

// 查询视图
$sql = "SELECT * FROM employee_view";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        echo "ID: " . $row["id"]. " - Name: " . $row["name"]. " - Department: " . $row["department"]. "<br>";
    }
} else {
    echo "0 结果";
}

$conn->close();
?>