Hello S.O.S needed pls

I need to extract data from database like variables.
I've done the connection with the DB like these:

<asp:SqlDataSource ID="SqlDataSource1" runat="sever" ConnectionString="<% ConnectionStrings:ConnectionString %>
SelectCommand="Select FROM * [Kargo_baza]"></%SqlDataSource>

There must be counter where it will check is there any new record who will be placed in the output, if there is not new record terminate or EOF.
Where should I wrote the loop and how it will be like. Is there any starting containers etc.etc.