title: Getting "ORA-01036: illegal variable name/number" in DeleteCommand of SqlDataSource
body: <p>I have a <strong>GridView</strong>. It's connected to a <strong>SqlDataSource</strong>. My database is <strong>Oracle</strong>. </p>
  
  <p>When I run the webpage, <strong>SELECT</strong> command works and I see the items in the list. When I click <strong>Delete</strong> button, I get this error:</p>
  
  <blockquote>
    <p>ORA-01036: illegal variable name/number</p>
  </blockquote>
  
  <p>Here is my GridView and SqlDataSource:</p>
  
  <pre><code>&lt;telerik:RadAjaxPanel ID="ajaxMyLinks" runat="server" width="100%" LoadingPanelID="RadAjaxLoadingPanel1"&gt;
       &lt;telerik:RadGrid ID="gridMyLinks" runat="server" DataSourceID="SqlDataSourceMyLinks" AllowAutomaticDeletes="True" AllowPaging="True" BackColor="White" BorderColor="White" PageSize="5" ShowHeader="False"&gt;
           &lt;MasterTableView AutoGenerateColumns="False" DataSourceID="SqlDataSourceMyLinks" DataKeyNames="N_USER_LINK_ID"&gt;
               &lt;Columns&gt;
                   &lt;telerik:GridHyperLinkColumn AllowSorting="False" DataNavigateUrlFields="V_LINK" DataNavigateUrlFormatString="{0}" DataTextField="V_LINK_TITLE" DataTextFormatString="{0}" FilterControlAltText="Filter column column" UniqueName="column" Target="_blank"&gt;
                   &lt;/telerik:GridHyperLinkColumn&gt;
                   &lt;telerik:GridButtonColumn ButtonType="ImageButton" CommandName="Delete" ImageUrl="Content/images/delete.png" UniqueName="column1"&gt;
                   &lt;/telerik:GridButtonColumn&gt;
               &lt;/Columns&gt;
           &lt;/MasterTableView&gt;
           &lt;PagerStyle Mode="NextPrev" ShowPagerText="False" /&gt;
       &lt;/telerik:RadGrid&gt;
   &lt;/telerik:RadAjaxPanel&gt;
  &lt;asp:SqlDataSource ID="SqlDataSourceMyLinks" runat="server" ConnectionString="&lt;%$ ConnectionStrings:DefaultConnection %&gt;" SelectCommand="SELECT V_LINK_TITLE, V_LINK, N_USER_LINK_ID FROM TAPP_IFH_USER_LINK WHERE (N_USER_ID = :USER_ID) ORDER BY N_USER_LINK_ID DESC" DeleteCommand="DELETE FROM TAPP_IFH_USER_LINK WHERE (N_USER_LINK_ID = :USER_LINK_ID)" ProviderName="&lt;%$ ConnectionStrings:DefaultConnection.ProviderName %&gt;"&gt;
    &lt;DeleteParameters&gt;
        &lt;asp:Parameter Name="USER_LINK_ID" Type="Int32"&gt;&lt;/asp:Parameter&gt;
    &lt;/DeleteParameters&gt;
    &lt;SelectParameters&gt;
        &lt;asp:SessionParameter Name="USER_ID" SessionField="USER_ID" /&gt;
    &lt;/SelectParameters&gt;
  &lt;/asp:SqlDataSource&gt;
  </code></pre>