{"type":"rich","version":"1.0","categories":["Software Development","\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9"],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fsatob.hatenablog.com%2Fentry%2F2023%2F08%2F20%2F223055\" title=\"Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3051\u308b\u8aa4\u3063\u305f\u60b2\u89b3\u30ed\u30c3\u30af\u306e\u5b9f\u88c5\u65b9\u6cd5\uff08Q&amp;A\u5f62\u5f0f\uff09 - Lazy Diary @ Hatena Blog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"\u203b\uff082024/02/11 \u8ffd\u8a18\uff09\u672c\u8a18\u4e8b\u5185\u3067\u300c\u60b2\u89b3\u6392\u4ed6\u300d\u300c\u60b2\u89b3\u30ed\u30c3\u30af\u300d\u3068\u8868\u8a18\u304c\u3086\u308c\u3066\u3044\u308b\u304c\u3001\u3044\u305a\u308c\u3082\u60b2\u89b3\u7684\u30ed\u30c3\u30af(optimistic locking)\u3092\u4f7f\u3063\u305f\u6392\u4ed6\u5236\u5fa1(mutual exclusion)\u306e\u3053\u3068\u3092\u610f\u5473\u3057\u3066\u3044\u308b\u3002 Q1: \u30b0\u30b0\u308b\u3068\u300c\u60b2\u89b3\u6392\u4ed6\u306e\u5b9f\u88c5\u306b\u306fSELECT FOR UPDATE\u3092\u4f7f\u3048\u300d\u3068\u66f8\u3044\u3066\u3042\u308b\u8a18\u4e8b*1\u3068\u3001\u305d\u308c\u3058\u3083\u3046\u307e\u304f\u3044\u304b\u306a\u3044\u3068\u66f8\u3044\u3066\u3042\u308b\u8a18\u4e8b\u304c\u3042\u308b\u3051\u3069\u3001\u3069\u3063\u3061\u304c\u6b63\u3057\u3044\u306e\uff1f A1: \u3088\u304f\u3042\u308bJava\u306b\u3088\u308b3\u5c64\u578bWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u60b2\u89b3\u30ed\u30c3\u30af\u306bDBMS\u306e\u884c\u30ed\u30c3\u30af\uff08Oracle\u306a\u3089SELECT FOR UPDATE\uff09\u3092\u4f7f\u3046\u3053\u3068\u306f\u307e\u305a\u4e0d\u53ef\u80fd\u3068\u601d\u308f\u308c\u308b\u3002 \u306a\u304a\u3001\u30e6\u30fc\u30b6\u306e\u753b\u9762\u64cd\u4f5c\u2026","published":"2023-08-20 22:30:55","provider_url":"https://hatena.blog","blog_url":"https://satob.hatenablog.com/","image_url":null,"author_name":"satob","url":"https://satob.hatenablog.com/entry/2023/08/20/223055","width":"100%","author_url":"https://blog.hatena.ne.jp/satob/","blog_title":"Lazy Diary @ Hatena Blog","height":"190","provider_name":"Hatena Blog","title":"Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3051\u308b\u8aa4\u3063\u305f\u60b2\u89b3\u30ed\u30c3\u30af\u306e\u5b9f\u88c5\u65b9\u6cd5\uff08Q&A\u5f62\u5f0f\uff09"}