c# 데이터베이스와 연동해서 데이터처리하는 부분 질문이요ㅠㅠ

private void set_date()
        {
            bool read;
            int db_date;
            string db_date_1;
            int result;
 
 
            string now_date_1 = DateTime.Now.ToString("yyyyMMdd");
            int now_date = Convert.ToInt32(now_date_1);
 
 
            string select_sql = "select releaseDate from DVD";
            string update_sql;
 
 
            Conn = new SqlConnection(strConn);
 
            Conn.Open();
 
            Comm = new SqlCommand(select_sql);
            Comm.Connection = Conn;
            Read = Comm.ExecuteReader();
 
 
 
            while (Read.Read())
            {
 
 
                db_date_1 = Read["releaseDate"].ToString();
                db_date = Convert.ToInt32(db_date_1);
                // Comm1.Parameters.Clear();
                result = now_date - db_date;
 
 
 
                if (result > 100)
                {
                    Read.Close();
                    Read.Dispose();
 
                    // Comm.Close();
                    Comm.Dispose();
                    // rel_string = "구프로";
                    update_sql = "update DVD set newOldInfo='old'";
 
                    Comm = new SqlCommand(update_sql);
                    Comm.Connection = Conn;
                    Read = Comm.ExecuteReader();
 
 
                }
                else
                {
                    Read.Close();
                    Read.Dispose();
 
                    // Comm.Close();
                    Comm.Dispose();
                    // rel_string = "구프로";
                    update_sql = "update DVD set newOldInfo='new'";
 
                    Comm = new SqlCommand(update_sql);
                    Comm.Connection = Conn;
                    Read = Comm.ExecuteReader();
                }
 
 
 
 
            }
 
 
            Conn.Close();