arangosh> db.example.insert({"a" : 1}); { "_id" : "example/15735", "_key" : "15735", "_rev" : "15735" } arangosh> db.example.update("example/19988371", ........> { "b" : null, "c" : null, "d" : 3 }); { "_id" : "example/19988371", "_key" : "19988371", "_rev" : "15738", "_oldRev" : "15731" } arangosh> db.example.document("example/19988371"); { "_key" : "19988371", "_id" : "example/19988371", "_rev" : "15738", "d" : 3, "c" : null, "b" : null } arangosh> db.example.update("example/19988371", { "a" : null }, false, false); { "_id" : "example/19988371", "_key" : "19988371", "_rev" : "15742", "_oldRev" : "15738" } arangosh> db.example.document("example/19988371"); { "_key" : "19988371", "_id" : "example/19988371", "_rev" : "15742", "b" : null, "c" : null, "d" : 3 } arangosh> db.example.update("example/19988371", ........> { "b" : null, "c": null, "d" : null }, false, false); { "_id" : "example/19988371", "_key" : "19988371", "_rev" : "15746", "_oldRev" : "15742" } arangosh> db.example.document("example/19988371"); { "_key" : "19988371", "_id" : "example/19988371", "_rev" : "15746" }