mongo 学习《1》

j = { name : "mongo" };

t = { x : 3 };

> db.things.save(j);
> db.things.save(t);
> db.things.find();

批量插入。

 for (var i = 1; i <= 20; i++) db.things.save({x : 4, j : i});
> db.things.find();
查询个数限制

db.things.find().limit(3);

----

var cursor = db.things.find();
> while (cursor.hasNext()) printjson(cursor.next());

db.things.find().forEach(printjson);

var arr = db.things.find().toArray();