{"published":"2023-02-17 23:38:03","blog_title":"HTN20190109\u306e\u65e5\u8a18","type":"rich","image_url":null,"description":"MySQL (8.0.31) drop table tab1;drop table tab2; create table tab1(col1 varchar(10), col2 int);create table tab2(col1 varchar(10), col2 int); insert into tab1 values('a',1);insert into tab2 values('a',1); insert into tab2 values('b',(select count(*) from tab1) );insert into tab2 values('c',(select co\u2026","height":"190","provider_name":"Hatena Blog","provider_url":"https://hatena.blog","version":"1.0","width":"100%","author_name":"HTN20190109","categories":["DB"],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhtn20190109.hatenablog.com%2Fentry%2F2023%2F02%2F17%2F233803\" title=\"values\u53e5\u5185\u3067\u30b5\u30d6\u30af\u30a8\u30ea - 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>","author_url":"https://blog.hatena.ne.jp/HTN20190109/","blog_url":"https://htn20190109.hatenablog.com/","title":"values\u53e5\u5185\u3067\u30b5\u30d6\u30af\u30a8\u30ea","url":"https://htn20190109.hatenablog.com/entry/2023/02/17/233803"}