如何在不显示的情况下读取SQLite数据？

Question

我使用了Sqflite。如何在不显示的情况下读取SQLite数据？我只需要与用户输入数据进行比较？

DatabaseHandle.dart

  Future<List<Url>> getUrl() async{
    var db_connection = await db;
    List<Map> list = await db_connection.rawQuery("SELECT uniform_resource_locator FROM Url Limit 1");
    List<Url> urls = List();
    for(int i = 0; i < list.length; i++){
      Url url = Url();
    //  url.id = list[i]['id'];
      url.uniform_resource_locator = list[i]['uniform_resource_locator'];
      urls.add(url);
    }
    return urls;
  }