Card List from SQL Source

Hi

I'm having a problem with my Cardlist in SW2015 EPDM.

The list ist createt automaticaly with the following command:

Select PARTTYPE from ZIBPDMTYPESPART

order by PARTTYPE

Result:

3D-Druck

Blecheteil

...

What I need ist just an additional empty Row in my list. Otherwise the users can't deselect an already made selection.

How is it possible zu achieve this result?

[empty Row]

3D-Druck

Blecheteil

...

Since I don't have any SQL experience, I'd appreciate any help.

SolidworksAdministration