arangosh> db.users.save({ name: "Gerhard" });
{ 
  "_id" : "users/25384348", 
  "_rev" : "25384348", 
  "_key" : "25384348" 
}
arangosh> db.users.save({ name: "Helmut" });
{ 
  "_id" : "users/25646492", 
  "_rev" : "25646492", 
  "_key" : "25646492" 
}
arangosh> db.users.save({ name: "Angela" });
{ 
  "_id" : "users/25843100", 
  "_rev" : "25843100", 
  "_key" : "25843100" 
}
arangosh> db.users.all().toArray();
[ 
  { 
    "name" : "Gerhard", 
    "_id" : "users/25384348", 
    "_rev" : "25384348", 
    "_key" : "25384348" 
  }, 
  { 
    "name" : "Angela", 
    "_id" : "users/25843100", 
    "_rev" : "25843100", 
    "_key" : "25843100" 
  }, 
  { 
    "name" : "Helmut", 
    "_id" : "users/25646492", 
    "_rev" : "25646492", 
    "_key" : "25646492" 
  } 
]
arangosh> db.users.byExample({ "_id" : "users/20" }).toArray();
[ ]
arangosh> db.users.byExample({ "name" : "Gerhard" }).toArray();
[ 
  { 
    "_id" : "users/25384348", 
    "_key" : "25384348", 
    "_rev" : "25384348", 
    "name" : "Gerhard" 
  } 
]
arangosh> db.users.byExample({ "name" : "Helmut", "_id" : "users/15" }).toArray();
[ ]