public static function databaseCreation()
    {
        global $wpdb;
        global $event_db_version;
        $table_name = $wpdb->prefix . 'integrate_occasions';
        $charset_collate = $wpdb->get_charset_collate();
        $sql = "CREATE TABLE $table_name (
        ID BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
        event_id BIGINT(20) UNSIGNED NOT NULL,
        start_date DATETIME NOT NULL,
        end_date DATETIME NOT NULL,
        door_time DATETIME DEFAULT NULL,
        status VARCHAR(50) DEFAULT NULL,
        exception_information VARCHAR(400) DEFAULT NULL,
        content_mode VARCHAR(50) DEFAULT NULL,
        content LONGTEXT DEFAULT NULL,
        PRIMARY KEY  (ID)
        ) $charset_collate;";
        require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
        dbDelta($sql);
        add_option('event_db_version', $event_db_version);
    }