Hello,
I have following schema - http://www2.pic-upload.de/img/30903969/schema.png.
How could I realize following queries (I think I must save the results from first part (email adress) of query because the two "tables" are joined over the email attribute).
1) Print all the names of the persons who have wrote an email to vorname="Anna" and nachname="Kraus".
2) Print all the persons (vorname and nachname) who has sent an email.
3) Print all elements from al phots which were uploaded by vorname="Anna" and nachname="Kraus".