{"url":"https://blog1.mammb.com/entry/2025/08/29/000000","provider_url":"https://hatena.blog","description":"PostgreSQL \u306e\u5916\u90e8\u30ad\u30fc\u5236\u7d04\u306b\u306f ON DELETE CASCADE \u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002 ... FOREIGN KEY (parent_id) REFERENCES parent_table (parent_id) ON DELETE CASCADE \u3053\u308c\u306b\u3088\u308a\u3001\u89aa\u30c6\u30fc\u30d6\u30eb\u306e\u30ec\u30b3\u30fc\u30c9\u304c\u524a\u9664\u3055\u308c\u305f\u3068\u304d\u306b\u3001\u305d\u306e\u89aa\u30ec\u30b3\u30fc\u30c9\u3092\u53c2\u7167\u3059\u308b\u5b50\u30c6\u30fc\u30d6\u30eb\u306e\u95a2\u9023\u30ec\u30b3\u30fc\u30c9\u304c\u81ea\u52d5\u7684\u306b\u524a\u9664\u3055\u308c\u308b\u3002 \u5916\u90e8\u30ad\u30fc\u306b ON DELETE CASCADE \u304c\u4ed8\u4e0e\u3055\u308c\u3066\u3044\u306a\u3044\u30b1\u30fc\u30b9\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u95a2\u6570\u3067 ON DELETE CASCADE \u3068\u540c\u3058\u3088\u3046\u306b\u3001\u518d\u5e30\u7684\u306b\u524a\u9664\u3092\u884c\u3046 DELETE \u6587\u304c\u751f\u6210\u3067\u304d\u308b\u3002 CREATE \u2026","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/N/Naotsugu/20250825/20250825215818.png","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog1.mammb.com%2Fentry%2F2025%2F08%2F29%2F000000\" title=\"\u3010PostgreSQL\u3011\u5916\u90e8\u30ad\u30fc\u53c2\u7167\u3057\u3066\u3044\u308b\u30ec\u30b3\u30fc\u30c9\u3092\u828b\u3065\u308b\u5f0f\u306b\u524a\u9664\u3059\u308b - A Memorandum\" 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","width":"100%","author_url":"https://blog.hatena.ne.jp/Naotsugu/","categories":[],"published":"2025-08-29 00:00:00","blog_url":"https://blog1.mammb.com/","provider_name":"Hatena Blog","blog_title":"A Memorandum","type":"rich","version":"1.0","title":"\u3010PostgreSQL\u3011\u5916\u90e8\u30ad\u30fc\u53c2\u7167\u3057\u3066\u3044\u308b\u30ec\u30b3\u30fc\u30c9\u3092\u828b\u3065\u308b\u5f0f\u306b\u524a\u9664\u3059\u308b","author_name":"Naotsugu"}