{"provider_url":"https://hatena.blog","version":"1.0","provider_name":"Hatena Blog","blog_title":"HTN20190109\u306e\u65e5\u8a18","url":"https://htn20190109.hatenablog.com/entry/2019/12/08/075716","published":"2019-12-08 07:57:16","author_name":"HTN20190109","width":"100%","blog_url":"https://htn20190109.hatenablog.com/","type":"rich","title":"IF EXISTS","image_url":null,"categories":["DB"],"author_url":"https://blog.hatena.ne.jp/HTN20190109/","description":"Oracle (12cR1) --\u30c6\u30fc\u30d6\u30eb select * from user_tables where table_name ='TAB1'; create table tab1(col1 int);create table if not exists tab1(col1 int);\u2192\u300ccreate table if not exists\u300d\u306f\u672a\u5bfe\u5fdc drop table tab1;drop table if exists tab1;\u2192\u300cdrop table if exists\u300d\u306f\u672a\u5bfe\u5fdc --\u30a4\u30f3\u30c7\u30c3\u30af\u30b9select * from user_indexes where index_name \u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhtn20190109.hatenablog.com%2Fentry%2F2019%2F12%2F08%2F075716\" title=\"IF EXISTS - 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"}