{"url":"https://yellowpepper.hatenadiary.org/entry/20120722/1342963040","width":"100%","published":"2012-07-22 22:17:20","blog_title":"Log4jpnLog","categories":["MySQL"],"provider_url":"https://hatena.blog","version":"1.0","description":"explain SELECT ~~ \u3082\u3057\u304f\u306f desc SELECT ~~ \u3053\u308c\u3067\u8abf\u3079\u3089\u308c\u308b.possible_keys \u306f\u5019\u88dc\u306e\u9375, key \u306f\u5b9f\u969b\u306b\u4f7f\u308f\u308c\u3066\u3044\u308b\u9375. mysql> explain select id from data where id=10102 and flg!=2; + id select_type table type possible_keys key key_len ref rows Extra + 1 SIMPLE user_card ref PRIMARY,i2 PRIMARY 4 const 18 Using where + 1 row in set (0\u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyellowpepper.hatenadiary.org%2Fentry%2F20120722%2F1342963040\" title=\"MySQL\u3067\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u52b9\u3044\u3066\u3044\u308b\u304b\u78ba\u304b\u3081\u308b\u65b9\u6cd5 - Log4jpnLog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","height":"190","title":"MySQL\u3067\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u52b9\u3044\u3066\u3044\u308b\u304b\u78ba\u304b\u3081\u308b\u65b9\u6cd5","provider_name":"Hatena Blog","image_url":null,"blog_url":"https://yellowpepper.hatenadiary.org/","type":"rich","author_url":"https://blog.hatena.ne.jp/yellowpepper/","author_name":"yellowpepper"}