Does Unity have something similar to ExecuteScalar?

Question

SQLite

Hello, please tell me if there is something similar to ExecuteScalar? I'm trying to make an entrance. I
wrote such a code, but apparently they don't prescribe it in the unit, please tell me how it will be more correct?

public void GetDB()
    {
        conn();
        try
        {
            string log= Inputlog.text.ToString();
            string _pass = Inputpass.text.ToString();

            cmd_db = new SqliteCommand("Select Password from User Where login='" + log+ "'");
            if (cmd_db.ExecuteScalar() != null)
            {
                if (cmd_db.ExecuteScalar().ToString() == _pass)
                {
                    cmd_db2 = new SqliteCommand("Select id from User Where  log='" + log+ "'");
                   int id = Convert.ToInt32(cmd_db2.ExecuteScalar());
               
                }
                else
                {
                   print("Неверный пароль!");
                }
            }
            else
            {
                  print("Неверный логин!");
            }

        }
        catch (Exception ex)
        {
          print(ex.ToString());
        }

Answer 1

I'm not sure that work with SQL is generally included in the dotnet unit implementation. Therefore, either look for a compatible library, or work through some api with the base and not directly.

Answer 2

ExecuteScalar() and the SQL library is not unity or .NET specific, should work.
If it doesn't work, why didn't they show the error.