CREATE TABLE IF NOT EXISTS visitor_logs (
    id INT AUTO_INCREMENT PRIMARY KEY,
    ip_address VARCHAR(45) NOT NULL,
    country VARCHAR(100) DEFAULT 'Unknown',
    country_code CHAR(2) DEFAULT '??',
    last_activity TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    session_id VARCHAR(255) NOT NULL,
    INDEX (last_activity),
    INDEX (ip_address)
);