I'm doing an update to a SQLserver database. I want to record the number of daily visits. but when the update is done, the visits are not added, they are replaced.
MY CODE:

```
namespace System
{
    class Day
    {
        SqlConnection conect= new SqlConnection(@"Data Source=USER\SQLEXPRESS; Initial Catalog=db_system; Integrated Security=true;");

        public void update_day(string value1, string value2)
        {

            SqlCommand cdm = new SqlCommand("UPDATE Visit SET day=  '" + Value1+ "' '" + Value2+ "' ' WHERE user='" + user1+ "' ", conect);

            SqlDataReader myReader;

            conect.Open();
            myReader = cdm.ExecuteReader();
            conect.Close();
            MessageBox.Show("Saved");

        }

    }
}

```

I want to add the value2, to the day column of my database.

SAMPLE:

...................TABLE day..........................

column: Visit (10) + Value2

Result:

column: Visit (11) + Value2

I need to add both values

value1 + value2 = 2
in the SqlCommand

I'm waiting for your help Friends, thanks.