{"image_url":null,"url":"https://bleis-tift.hatenablog.com/entry/20080303/1204553810","published":"2008-03-03 23:16:50","width":"100%","categories":["SQL"],"provider_name":"Hatena Blog","author_name":"bleis-tift","type":"rich","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fbleis-tift.hatenablog.com%2Fentry%2F20080303%2F1204553810\" title=\"count\u306f\u975e\u52b9\u7387\uff1f - \u3050\u308b\u3050\u308b\uff5e\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"count\u306f\u975e\u52b9\u7387\uff1f","blog_title":"\u3050\u308b\u3050\u308b\uff5e","description":"\u306a\u3093\u304bPM\u304ccount\u306f\u30c6\u30fc\u30d6\u30eb\u5168\u4f53\u3092\u8d70\u67fb\u3059\u308b\u304b\u3089\u3001\u884c\u65700\u3092\u5224\u65ad\u3059\u308b\u306a\u3089top 1\u4f7f\u3048\u3068\u304b\u8a00\u3044\u51fa\u3057\u305f\u3002 \u305d\u3082\u305d\u3082top\u306fSQL Server\u306e\u307f\u306e\u6a5f\u80fd\u3068\u3044\u3046\u306e\u306f\u7f6e\u3044\u3068\u304f\u3068\u3057\u3066\u3082\u3001100\u4e07\u30ec\u30b3\u30fc\u30c9\u306e\u30c6\u30fc\u30d6\u30eb\u3067count\u3067\u3082top 1\u3067\u3082\u77ac\u6642\u306b\u7d42\u308f\u308b\u3093\u3067\u3059\u304c\u30fb\u30fb\u30fb \u30c6\u30fc\u30d6\u30eb\u5168\u4f53\u3092\u301c\u3001\u3063\u3066\u306e\u3082RDBMS\u3092\u306a\u3081\u3059\u304e\u3066\u307e\u305b\u3093\uff1fSQL Server\u306fB+\u6728\u3092\u4f7f\u3063\u3066\u305f\u306f\u305a\u3060\u304b\u3089O(N)\u3063\u3066\u308f\u3051\u3058\u3083\u306a\u3044\u3063\u3059\u3088\u3002 \u305d\u3093\u306a\u6709\u610f\u5dee\u304c\u51fa\u308b\u304b\u3069\u3046\u304b\u3082\u602a\u3057\u3044\u3068\u3053\u308d\u3092\u3069\u3046\u3053\u3046\u8a00\u3046\u3088\u308a\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u8a2d\u8a08\u898b\u76f4\u3057\u3066\u304f\u308c\u307e\u305b\u3093\u304b\u306d\uff1f \u91cd\u8907\u3060\u3089\u3051\u3067\u3069\u3053\u3092\u4fe1\u3058\u3066\u3044\u3044\u306e\u3084\u3089\u5206\u304b\u3089\u306a\u3044\u306e\u3067\u3059\u304c\u3002 \u305d\u308c\u3068\u3001\u30b9\u30c8\u30a2\u30c9\u30d7\u30ed\u30b7\u30fc\u30b8\u30e3\u3092\u4f7f\u3046\u7406\u7531\u304c\u2026","blog_url":"https://bleis-tift.hatenablog.com/","author_url":"https://blog.hatena.ne.jp/bleis-tift/","version":"1.0","provider_url":"https://hatena.blog"}