<?php
require_once 'db/config.php';

try {
    $pdo = db();
    $sql = "ALTER TABLE `patient_visits` CHANGE `id` `visit_id` INT(11) NOT NULL AUTO_INCREMENT;";
    $pdo->exec($sql);
    echo "Table 'patient_visits' altered successfully. Column 'id' renamed to 'visit_id'.\n";
} catch (PDOException $e) {
    die("Database error: " . $e->getMessage());
}
?>