--> in d_events
--> in d_events_att
var j = from a in db.d_events_att.Where(w => w.domain == "A_DRUGS") //Consegna farmaci from b in db.d_events_att.Where(w => w.domain == "A_DPRES" && a.vn13 == w.id_events_att).DefaultIfEmpty() //Diaria Posologia