arangosh> db.users.save({ name: "Gerhard" });
{ 
  "_id" : "users/25817995", 
  "_rev" : "25817995", 
  "_key" : "25817995" 
}
arangosh> db.users.save({ name: "Helmut" });
{ 
  "_id" : "users/26080139", 
  "_rev" : "26080139", 
  "_key" : "26080139" 
}
arangosh> db.users.save({ name: "Angela" });
{ 
  "_id" : "users/26276747", 
  "_rev" : "26276747", 
  "_key" : "26276747" 
}
arangosh> db.users.all().toArray();
[ 
  { 
    "name" : "Helmut", 
    "_id" : "users/26080139", 
    "_rev" : "26080139", 
    "_key" : "26080139" 
  }, 
  { 
    "name" : "Angela", 
    "_id" : "users/26276747", 
    "_rev" : "26276747", 
    "_key" : "26276747" 
  }, 
  { 
    "name" : "Gerhard", 
    "_id" : "users/25817995", 
    "_rev" : "25817995", 
    "_key" : "25817995" 
  } 
]
arangosh> db.users.byExample({ "_id" : "users/20" }).toArray();
[ ]
arangosh> db.users.byExample({ "name" : "Gerhard" }).toArray();
[ 
  { 
    "_id" : "users/25817995", 
    "_key" : "25817995", 
    "_rev" : "25817995", 
    "name" : "Gerhard" 
  } 
]
arangosh> db.users.byExample({ "name" : "Helmut", "_id" : "users/15" }).toArray();
[ ]