{"author_name":"quoll00","provider_name":"Hatena Blog","version":"1.0","type":"rich","height":"190","provider_url":"https://hatena.blog","blog_title":"Carpe Diem","url":"https://christina04.hatenablog.com/entry/2015/03/03/125643","blog_url":"https://christina04.hatenablog.com/","published":"2015-03-03 12:56:43","width":"100%","image_url":"http://cdn-ak.f.st-hatena.com/images/fotolife/q/quoll00/20150303/20150303032220.jpg","title":"MongoDB\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9","author_url":"https://blog.hatena.ne.jp/quoll00/","description":"\u6982\u8981 MongoDB\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u3064\u3051\u308b\u4e0a\u3067 \u8907\u5408\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u6642\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u9806\u756a\u306b\u6c17\u3092\u3064\u3051\u308b {a: 1, b: 1}\u306e\u53cd\u5bfe{a: -1, b: -1}\u306f\u4f7f\u3048\u308b\u3051\u3069{a: 1, b: -1}\u306f\u4f7f\u3048\u306a\u3044 \u306a\u3069\u3044\u308d\u3044\u308d\u6c17\u3092\u3064\u3051\u308b\u70b9\u304c\u591a\u304f\u3001\u4e00\u5ea6\u3057\u3063\u304b\u308a\u5b66\u3093\u3067\u307f\u307e\u3057\u305f\u306e\u3067\u305d\u306e\u30e1\u30e2\u3002 \u57fa\u672c\u7684\u306b\u30af\u30a8\u30ea\u3092explain()\u3057\u3066\u3069\u3046\u306a\u3063\u305f\u304b\u5b9f\u9a13\u3057\u305f\u7d50\u679c\u3092\u307e\u3068\u3081\u3066\u307e\u3059\u3002 \u74b0\u5883 Ubuntu 14.04 MongoDB 2.6.8 \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3067\u306e\u30dd\u30a4\u30f3\u30c8 explain()\u3057\u305f\u6642\u306e\u7d50\u679c\u3092\u898b\u308b\u4e0a\u3067\u30dd\u30a4\u30f3\u30c8\u3068\u306a\u308b\u70b9\u3092\u4ee5\u4e0b\u306b\u307e\u3068\u3081\u307e\u3059\u3002 explain()\u3057\u305f\u6642\u306e\u30b5\u30f3\u30d7\u30eb > db.restaurants.f\u2026","categories":["MongoDB","NoSQL"],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fchristina04.hatenablog.com%2Fentry%2F2015%2F03%2F03%2F125643\" title=\"MongoDB\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9 - Carpe Diem\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>"}