Hi,
I am creating email subscriptions for one of the reports on my reporting server. 
in step 4
Step 4 - Create a data-driven subscription: 
at the bottom of the page there is a radio button 
Include Link
 Specify a static value: True False
 Get the value from the database: Choose a field Comment Please select a database field to use.
 Blank database field names can not be used. 
 No value 
If I select 'No Value' for this radio button where does this value get stored in the database. How can I check this with a query instead of going back to edit the subscription screen?
Thanks.