{"version":"1.0","categories":["MySQL","\u5b9f\u884c\u8a08\u753b"],"blog_url":"https://tamata78.hatenablog.com/","provider_name":"Hatena Blog","author_name":"tamata78","url":"https://tamata78.hatenablog.com/entry/2021/05/21/172146","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftamata78.hatenablog.com%2Fentry%2F2021%2F05%2F21%2F172146\" title=\"MySQL \u5b9f\u884c\u8a08\u753b(EXPLAIN) - \u6c17\u8efd\u306b\u697d\u3057\u304f\u30d7\u30ed\u30b0\u30e9\u30e0\u3068\u904a\u3076\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_url":"https://hatena.blog","title":"MySQL \u5b9f\u884c\u8a08\u753b(EXPLAIN)","type":"rich","description":"MySQL\u306b\u304a\u3051\u308b\u5b9f\u884c\u8a08\u753b\u306e\u898b\u65b9\u306b\u3064\u3044\u3066\u8a18\u8f09\u3057\u307e\u3059\u3002 EXPLAIN \u7d50\u679c\u78ba\u8a8d \u30af\u30a8\u30ea\u30b3\u30b9\u30c8\u3092\u307f\u305f\u3044\u5834\u5408 format=json\u3092\u3064\u3051\u3066explain\u3092\u5b9f\u884c\u3059\u308b\u3002 explain format=json \u3010\u30af\u30a8\u30ea\u3011 \u7d50\u679cJson query_cost\u306e\u7b87\u6240\u306b\u30b3\u30b9\u30c8\u304c\u8868\u793a\u3055\u308c\u308b { \"query_block\": { \"select_id\": 1, \"cost_info\": { \"query_cost\": \"3599.86\" }, \"nested_loop\": [ { \"table\": { \"table_name\": \"s\", \"access_type\": \"ALL\", \"possible_key\u2026","blog_title":"\u6c17\u8efd\u306b\u697d\u3057\u304f\u30d7\u30ed\u30b0\u30e9\u30e0\u3068\u904a\u3076","width":"100%","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/t/tamata78/20210521/20210521172119.png","published":"2021-05-21 17:21:46","author_url":"https://blog.hatena.ne.jp/tamata78/"}