{"categories":["DB"],"type":"rich","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhtn20190109.hatenablog.com%2Fentry%2F2020%2F02%2F22%2F194403\" title=\"nested loop - 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>","provider_url":"https://hatena.blog","width":"100%","blog_url":"https://htn20190109.hatenablog.com/","description":"MySQL (5.6)--\u78ba\u8a8d\u4e8b\u9805(\u7d5e\u308a\u8fbc\u307f\u5f8c)\u4ef6\u6570\u304c\u5c11\u306a\u3044\u30c6\u30fc\u30d6\u30eb\u304c\u5916\u90e8\u8868\u3068\u306a\u308b\u3053\u3068 --\u30c7\u30fc\u30bf\u6e96\u5099 drop table tab1;drop table tab2; create table tab1(col11 int,col12 int,col13 int);create table tab2(col21 int,col22 int,col23 int); alter table tab1 add constraint cons1 primary key(col11);alter table tab2 add constraint cons2 primary key(col21,col\u2026","published":"2020-02-22 19:44:03","blog_title":"HTN20190109\u306e\u65e5\u8a18","author_name":"HTN20190109","title":"nested loop","image_url":null,"height":"190","url":"https://htn20190109.hatenablog.com/entry/2020/02/22/194403","version":"1.0","author_url":"https://blog.hatena.ne.jp/HTN20190109/","provider_name":"Hatena Blog"}