{"url":"https://masterpiyo.hatenadiary.org/entry/20111013/1318532274","categories":["Rails","Ruby"],"published":"2011-10-13 03:57:54","blog_title":"\u3086\u3063\u304f\u308a\u30d6\u30ed\u30b0","author_url":"https://blog.hatena.ne.jp/masterpiyo/","width":"100%","height":"190","title":"\u3010Rails\u3011size\u3068count\u3068length\u306b\u3064\u3044\u3066","author_name":"masterpiyo","image_url":null,"blog_url":"https://masterpiyo.hatenadiary.org/","version":"1.0","description":"\u53e4\u3044\u30bd\u30fc\u30b9\u3092\u773a\u3081\u3066\u3044\u3066\u6c17\u3065\u3044\u305f\u3053\u3068\u306a\u3093\u3060\u3051\u3069\u3001\u3044\u3084\u3001\u3046\u3093\u3001\u3068\u3044\u3046\u304b\u3061\u3087\u3063\u3068\u3053\u308c\u306f\u30fb\u30fb\u3068\u601d\u3046\u66f8\u304d\u65b9\u304c\u3042\u3063\u305f\u306e\u3067\u3002 class Yukkuri < ActiveRecord::Base end \u3068\u3001\u3044\u3064\u3082\u306e\u30e2\u30c7\u30eb\u304c\u3042\u3063\u3066\u3001\u3053\u306e\u30e2\u30c7\u30eb\u306eyukkuris\u30c6\u30fc\u30d6\u30eb\u306e\u5168\u30ec\u30b3\u30fc\u30c9\u6570\u3092\u78ba\u8a8d\u3057\u3088\u3046\u3068\u3057\u3066\u3001\u3060\u3068\u306f\u601d\u3046\u3093\u3060\u3051\u3069\u3001 p Yukkuri.all.size \u306a\u308b\u30b3\u30fc\u30c9\u304c\u66f8\u3044\u3066\u3042\u3063\u305f\u30fb\u30fb\u30fb \u3044\u3084\u3041\u3053\u308c\u306f\u306a\u3044\u306a\u3068\u3002 \u3053\u308c\u3063\u3066\u8981\u306f\u3001\u6383\u304d\u51fa\u3055\u308c\u308bSQL\u3092\u898b\u308b\u3068\u3088\u304f\u308f\u304b\u308b\u3051\u3069\u3001 \u3053\u3046\u66f8\u3044\u305f\u5834\u5408\u306esize\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u914d\u5217\u306e\u30b5\u30a4\u30ba\u3092\u53d6\u5f97\u3059\u308b\u3060\u3051\u306a\u306e\u3067\u3001select count(*) from yukkuris \u301c \u3068\u3044\u2026","type":"rich","provider_url":"https://hatena.blog","provider_name":"Hatena Blog","html":""}