{"type":"rich","provider_name":"Hatena Blog","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhtn20190109.hatenablog.com%2Fentry%2F2020%2F03%2F07%2F190748\" title=\"\u4e3b\u30ad\u30fc\u69cb\u6210\u30ab\u30e9\u30e0\u306e\u53d6\u5f97 - 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>","title":"\u4e3b\u30ad\u30fc\u69cb\u6210\u30ab\u30e9\u30e0\u306e\u53d6\u5f97","author_url":"https://blog.hatena.ne.jp/HTN20190109/","version":"1.0","categories":["DB"],"blog_url":"https://htn20190109.hatenablog.com/","author_name":"HTN20190109","width":"100%","url":"https://htn20190109.hatenablog.com/entry/2020/03/07/190748","provider_url":"https://hatena.blog","height":"190","blog_title":"HTN20190109\u306e\u65e5\u8a18","published":"2020-03-07 19:07:48","description":"MySQL (5.6) drop table tab1;create table tab1( col1 int, col2 int, col3 int); create index ind2 on tab1(col2,col3);alter table tab1 add constraint tab1pk primary key (col1,col2); select index_name,seq_in_index,column_namefrom information_schema.statisticswhere table_schema = 'test'and table_name = '\u2026"}