> db.userlog.find({}, {"_id": 0}); { "user_id" : 1, "path" : "mypage", "timestamp" : ISODate("2013-06-12T15:00:00Z") } { "user_id" : 2, "path" : "mypage", "timestamp" : ISODate("2013-06-12T15:00:00Z") } { "user_id" : 3, "path" : "mypage", "timestamp" : ISODate("2013-06-12T15:00:00Z") } { "user_id" : 4, "path" : "mypage", "timestamp" : ISODate("2013-06-12T15:00:00Z") } { "user_id" : 5, "path" : "my