HTN20190109 https://blog.hatena.ne.jp/HTN20190109/ HTN20190109の日記 https://htn20190109.hatenablog.com/ DB MySQL (8.0.22)https://qiita.com/reneice/items/b385e143fcbb144f4f3e -- 時刻→UNIXタイムselect unix_timestamp('2021-09-19 12:34:56');select unix_timestamp(now()); -- UNIXタイム→時刻 select from_unixtime(1632036429); Oracle (19c)http://kazemati.blogspot.com/2011/05/oracle-sqldateunix.html -- 時刻→UNIXタイム select to_… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhtn20190109.hatenablog.com%2Fentry%2F2021%2F09%2F19%2F163509" title="UNIXタイムと時刻の変換 - HTN20190109の日記" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2021-09-19 16:35:09 rich https://htn20190109.hatenablog.com/entry/2021/09/19/163509 1.0 100%