{"title":"ER\u56f3\u306e\u8868\u8a18\u6cd5\u3054\u3068\u306b\u30ab\u30fc\u30c7\u30a3\u30ca\u30ea\u30c6\u30a3\u3092\u4e26\u3079\u3066\u307f\u305f","author_name":"kanonji","provider_name":"Hatena Blog","version":"1.0","width":"100%","blog_url":"https://kanonji.hatenadiary.com/","type":"rich","blog_title":"kanonji\u2019s diary","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkanonji.hatenadiary.com%2Fentry%2F20100219%2F1266542059\" title=\"ER\u56f3\u306e\u8868\u8a18\u6cd5\u3054\u3068\u306b\u30ab\u30fc\u30c7\u30a3\u30ca\u30ea\u30c6\u30a3\u3092\u4e26\u3079\u3066\u307f\u305f - kanonji\u2019s diary\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_url":"https://hatena.blog","url":"https://kanonji.hatenadiary.com/entry/20100219/1266542059","categories":["database"],"image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/k/kanonji/20100222/20100222153554.png","author_url":"https://blog.hatena.ne.jp/kanonji/","description":"ER\u56f3\u306e\u8868\u8a18\u6cd5\u3068\u3057\u3066\u3001IE\u8868\u8a18\u3068IDEF1X\u306e2\u3064\u304c\u826f\u304f\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002 \u305d\u308c\u305e\u308c\u30ab\u30fc\u30c7\u30a3\u30ca\u30ea\u30c6\u30a3\u306e\u8868\u3057\u65b9\u304c\u9055\u3046\u3057\u3001\u3069\u3061\u3089\u3082\u3042\u307e\u308a\u76f4\u611f\u7684\u3058\u3083\u306a\u3044\u6c17\u304c\u3057\u307e\u3059\u3002 \u5206\u304b\u3089\u306a\u304f\u306a\u3063\u305f\u6642\u306b\u53c2\u7167\u3067\u304d\u308b\u3088\u3046\u306b\u3001\u305d\u308c\u305e\u308c\u306eER\u56f3\u3067\u30ab\u30fc\u30c7\u30a3\u30ca\u30ea\u30c6\u30a3\u3092\u4e26\u3079\u3066\u307f\u307e\u3057\u305f\u3002 \u306a\u304a\u3001ER\u56f3\u306fA5:SQL Mk-2\u3092\u4f7f\u3063\u3066\u66f8\u304d\u307e\u3057\u305f\u3002 \u89aa\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u5074\u306e\u30ab\u30fc\u30c7\u30a3\u30ca\u30ea\u30c6\u30a3\u304c 0 or 1 \u306e\u5834\u5408\u3001\u5b50\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u5074\u3068\u306f\u9055\u3063\u305f\u83f1\u5f62\u306e\u8a18\u53f7\u306b\u306a\u308b\u4e8b\u306b\u6c17\u304c\u4ed8\u3044\u305f\u306e\u3067\u3001\u753b\u50cf\u3092\u5dee\u3057\u66ff\u3048\u307e\u3057\u305f\u3002 \u89aa\u304c0\u3068\u3044\u3046\u306e\u306f\u3001\u975e\u4f9d\u5b58\u306a\u95a2\u4fc2\u306e\u5834\u5408\u306b\u306e\u307f\u3042\u308a\u3048\u308b\u306e\u3067\u3001\u83f1\u5f62\u306f\u72ec\u7acb\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u5834\u5408\u306b\u306e\u307f\u6307\u5b9a\u3067\u304d\u308b\u3068\u3044\u3046\u8aac\u660e\u3092\u898b\u304b\u3051\u305f\u3051\u307e\u3057\u305f\u3002 \u30c4\u30fc\u30eb\u4e0a\u306f\u4f9d\u5b58\u2026","height":"190","published":"2010-02-19 10:14:19"}