{"provider_name":"Hatena Blog","blog_url":"https://yohei-a.hatenablog.jp/","url":"https://yohei-a.hatenablog.jp/entry/20090904/1252043033","width":"100%","version":"1.0","author_name":"yohei-a","categories":["Oracle"],"blog_title":"ablog","title":"INDEX UNIQUE SCAN \u3068 INDEX RANGE SCAN","type":"rich","height":"190","published":"2009-09-04 14:43:53","author_url":"https://blog.hatena.ne.jp/yohei-a/","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyohei-a.hatenablog.jp%2Fentry%2F20090904%2F1252043033\" title=\"INDEX UNIQUE SCAN \u3068 INDEX RANGE SCAN - ablog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"\u5b9f\u884c\u8a08\u753b\u3092\u898b\u3066\u308b\u3068\u3067\u3066\u304f\u308b INDEX UNIQUE SCAN \u3068 INDEX RANGE SCAN \u3063\u3066\u306a\u3093\u3060\uff1f 11.5.3.2 \u7d22\u5f15\u4e00\u610f\u30b9\u30ad\u30e3\u30f3\u3053\u306e\u30b9\u30ad\u30e3\u30f3\u306f1\u3064\u306eROWID\u3057\u304b\u623b\u3057\u307e\u305b\u3093\u3002\u5358\u4e00\u884c\u306b\u3057\u304b\u30a2\u30af\u30bb\u30b9\u3057\u306a\u3044\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u3066\u3044\u308bUNIQUE\u5236\u7d04\u307e\u305f\u306fPRIMARY KEY\u5236\u7d04\u304c\u6587\u306b\u5b58\u5728\u3059\u308b\u5834\u5408\u3001Oracle\u306f\u4e00\u610f\u30b9\u30ad\u30e3\u30f3\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002\u4f8b11-2\u300cEXPLAIN PLAN\u51fa\u529b\u300d\u3067\u306f\u3001jobs\u8868\u304a\u3088\u3073departments\u8868\u3067\u3001\u305d\u308c\u305e\u308cjob_id_pk\u7d22\u5f15\u3068dept_id_pk\u7d22\u5f15\u3092\u4f7f\u7528\u3057\u3066\u7d22\u5f15\u30b9\u30ad\u30e3\u30f3\u304c\u5b9f\u884c\u3055\u308c\u307e\u3059 \u554f\u5408\u305b\u30aa\u30d7\u30c6\u30a3\u30de\u30a4\u30b6 11.5.3.3 \u7d22\u5f15\u30ec\u30f3\u30b8\u30fb\u30b9\u30ad\u30e3\u30f3\u7d22\u5f15\u2026","provider_url":"https://hatena.blog"}