Sql statement error

[youngnoviceinneedofh]

Hi Is there an error in my sql update statement here?
I am trying to read, adjust and write back to the same cell in a database. I think I can do it like this but i get an error on the executenonquery line.

Dim conn1 As New System.Data.OleDb.OleDbConnection(m_sConn2)
        conn1.Open()
        Dim cmd As New System.Data.OleDb.OleDbCommand()
        cmd.Connection = conn1
        cmd.CommandText = "SELECT " & Night & " FROM TblContacts WHERE Phone='" & incomingtextno & "'"
        Dim myOleDbCommand As New OleDbCommand(cmd.CommandText, cmd.Connection)

        Using myDataReader As OleDbDataReader = myOleDbCommand.ExecuteReader()

            If myDataReader.HasRows() Then

                While myDataReader.Read()
                    current_count = myDataReader.Item(Night).ToString + vbCrLf
                    TxtEventLog.Text = current_count
                    current_count = current_count + Quantity
                    cmd.CommandText = "UPDATE TblContacts SET " & Night & "='" & current_count & "' Where Phone='" & incomingtextno & "'"
                    cmd.ExecuteNonQuery()
                    ' index = index + 1

                    notfound = 0
                End While
            Else
                notfound = 1
                ' Address_text.Text = "Not Found"
            End If
        End Using
        con.Close()

[danasegarane]

What is the error message ?

[youngnoviceinneedofh]

The error is on the ExecuteNonQuery line and is
"Data type mismatch in criteria expression."

[danasegarane]

This could be the case where you include your values within '' which is not required. Use the parameters as suggested here