{"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhtn20190109.hatenablog.com%2Fentry%2F2021%2F04%2F05%2F213252\" title=\"\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u30ea\u30fc\u30d5\u30ce\u30fc\u30c9\u306b\u542b\u307e\u308c\u308b\u30c7\u30fc\u30bf - HTN20190109\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","width":"100%","categories":["DB"],"version":"1.0","image_url":null,"author_url":"https://blog.hatena.ne.jp/HTN20190109/","published":"2021-04-05 21:32:52","type":"rich","provider_name":"Hatena Blog","blog_url":"https://htn20190109.hatenablog.com/","title":"\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u30ea\u30fc\u30d5\u30ce\u30fc\u30c9\u306b\u542b\u307e\u308c\u308b\u30c7\u30fc\u30bf","provider_url":"https://hatena.blog","blog_title":"HTN20190109\u306e\u65e5\u8a18","author_name":"HTN20190109","url":"https://htn20190109.hatenablog.com/entry/2021/04/05/213252","height":"190","description":"MySQL (8.0.22)https://dev.mysql.com/doc/refman/8.0/en/innodb-index-types.html (1)\u30af\u30e9\u30b9\u30bf\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u5834\u5408(\u901a\u5e38\u3001\u4e3b\u30ad\u30fc\u306e\u5834\u5408)\u3059\u3079\u3066\u306e\u30ab\u30e9\u30e0\u304c\u30ea\u30fc\u30d5\u30ce\u30fc\u30c9\u306b\u542b\u307e\u308c\u308b (2)\u30bb\u30ab\u30f3\u30c0\u30ea\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u5834\u5408\u30bb\u30ab\u30f3\u30c0\u30ea\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u30ab\u30e9\u30e0\u3068\u4e3b\u30ad\u30fc\u306e\u30ab\u30e9\u30e0\u304c\u542b\u307e\u308c\u308b -- \u52d5\u4f5c\u78ba\u8a8d drop table tab1;create table tab1(col1 int,col2 int,col3 int,col4 int); alter table tab1 add constraint tab1pk primary ke\u2026"}