SQL Server xQuery return NULL instead of empty

Question

So in this example I\'m trying to return a NULL instead of an empty nvarchar for element2 and element3. I can\'t seem to find an answer to this anywhere, or if it\'s even po

Answer 1

I'm not sure what language you are writing in from your question, but SQL Server has a NullIf(val, CheckValue) function. If you can include that in the sql you pass to the server that should do the trick:

   Select NullIf(element2, '') 

will return a null if element2 is equal to an empty string ('')