{"description":"MySQL (8.0.22) drop table tab2;drop table tab1; create table tab1(col1 int,col2 int);create table tab2(col1 int,col2 int); alter table tab1 add constraint tab1pk primary key(col1);alter table tab2 add constraint tab2pk primary key(col1); alter table tab2 add constraint tab2fk foreign key(col2) refer\u2026","url":"https://htn20190109.hatenablog.com/entry/2021/07/03/164220","provider_url":"https://hatena.blog","type":"rich","title":"\u5916\u90e8\u30ad\u30fc\u66f4\u65b0\u6642\u6319\u52d5\u78ba\u8a8d","categories":["DB"],"image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhtn20190109.hatenablog.com%2Fentry%2F2021%2F07%2F03%2F164220\" title=\"\u5916\u90e8\u30ad\u30fc\u66f4\u65b0\u6642\u6319\u52d5\u78ba\u8a8d - 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>","height":"190","author_url":"https://blog.hatena.ne.jp/HTN20190109/","blog_url":"https://htn20190109.hatenablog.com/","width":"100%","provider_name":"Hatena Blog","author_name":"HTN20190109","version":"1.0","published":"2021-07-03 16:42:20","blog_title":"HTN20190109\u306e\u65e5\u8a18"}