{"id":1523,"date":"2026-03-23T03:54:29","date_gmt":"2026-03-23T03:54:29","guid":{"rendered":"https:\/\/www.ez-knowledge.com\/ja\/modeling-hierarchical-data-er-diagrams\/"},"modified":"2026-03-23T03:54:29","modified_gmt":"2026-03-23T03:54:29","slug":"modeling-hierarchical-data-er-diagrams","status":"publish","type":"post","link":"https:\/\/www.ez-knowledge.com\/ja\/modeling-hierarchical-data-er-diagrams\/","title":{"rendered":"\u6a19\u6e96ER\u56f3\u5185\u3067\u306e\u968e\u5c64\u30c7\u30fc\u30bf\u306e\u30e2\u30c7\u30ea\u30f3\u30b0"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Hand-drawn infographic comparing three approaches for modeling hierarchical data in ER diagrams: Adjacency List (parent_id self-reference), Nested Sets (lft\/rgt interval values), and Materialized Path (stored path strings). Visual comparison includes schema examples, pros\/cons icons, performance metrics table, and a decision flowchart to help developers choose the right pattern based on read\/write needs and hierarchy depth.\" decoding=\"async\" src=\"https:\/\/www.ez-knowledge.com\/wp-content\/uploads\/2026\/03\/hierarchical-data-er-diagram-models-infographic.jpg\"\/><\/figure>\n<\/div>\n<p>\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u3001\u30c6\u30fc\u30d6\u30eb\u3068\u884c\u306e\u69cb\u9020\u306b\u57fa\u3065\u3044\u3066\u304a\u308a\u3001\u3053\u308c\u306f\u30d5\u30e9\u30c3\u30c8\u30c7\u30fc\u30bf\u5411\u3051\u306b\u8a2d\u8a08\u3055\u308c\u305f\u3082\u306e\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u73fe\u5b9f\u4e16\u754c\u306f\u305d\u3046\u5358\u7d14\u306b\u5f93\u308f\u306a\u3044\u3053\u3068\u304c\u307b\u3068\u3093\u3069\u3067\u3059\u3002\u7d44\u7e54\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3001\u30b3\u30e1\u30f3\u30c8\u30b9\u30ec\u30c3\u30c9\u3001\u30ab\u30c6\u30b4\u30ea\u30c4\u30ea\u30fc\u306f\u3059\u3079\u3066\u3001<strong>\u968e\u5c64\u69cb\u9020<\/strong>\u306b\u5b58\u5728\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u89aa\u5b50\u95a2\u4fc2\u3092\u6a19\u6e96\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\uff08ERD\uff09\u3067\u8868\u73fe\u3059\u308b\u306b\u306f\u3001\u30c7\u30fc\u30bf\u6574\u5408\u6027\u3092\u4fdd\u3061\u3064\u3064\u52b9\u7387\u7684\u306a\u53d6\u5f97\u3092\u53ef\u80fd\u306b\u3059\u308b\u7279\u5b9a\u306e\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<p>\u30c4\u30ea\u30fc\u69cb\u9020\u3092\u30d5\u30e9\u30c3\u30c8\u30b9\u30ad\u30fc\u30de\u306b\u30de\u30c3\u30d4\u30f3\u30b0\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001\u6b63\u898f\u5316\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u9593\u3067\u53e4\u5178\u7684\u306a\u30b8\u30ec\u30f3\u30de\u306b\u76f4\u9762\u3057\u307e\u3059\u3002\u3053\u306e\u30ac\u30a4\u30c9\u3067\u306f\u3001\u968e\u5c64\u30c7\u30fc\u30bf\u3092\u30e2\u30c7\u30ea\u30f3\u30b0\u3059\u308b\u305f\u3081\u306e\u4e3b\u8981\u306a\u6280\u8853\u3092\u691c\u8a0e\u3057\u3001\u5404\u30a2\u30d7\u30ed\u30fc\u30c1\u306e\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5\u3092\u8a55\u4fa1\u3059\u308b\u3053\u3068\u3067\u3001\u5805\u7262\u306a\u30b7\u30b9\u30c6\u30e0\u8a2d\u8a08\u3092\u652f\u63f4\u3057\u307e\u3059\u3002<\/p>\n<h2>\ud83e\udde9 \u30d5\u30e9\u30c3\u30c8\u30b9\u30ad\u30fc\u30de\u306e\u8ab2\u984c<\/h2>\n<p>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u306f\u901a\u5e38\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u30dc\u30c3\u30af\u30b9\u3067\u3001\u95a2\u4fc2\u3092\u7dda\u3067\u53ef\u8996\u5316\u3057\u307e\u3059\u3002\u6a19\u6e96\u7684\u306a\u95a2\u4fc2\u3067\u306f\u30011\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u304c\u5916\u90e8\u30ad\u30fc\u3092\u901a\u3058\u3066\u5225\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u30ea\u30f3\u30af\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u65b9\u5411\u304c\u56fa\u5b9a\u3055\u308c\u305f\u591a\u5bfe\u591a\u307e\u305f\u306f1\u5bfe\u591a\u306e\u30b7\u30ca\u30ea\u30aa\u3067\u306f\u5b8c\u74a7\u306b\u6a5f\u80fd\u3057\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u30ab\u30c6\u30b4\u30ea\u304c\u30b5\u30d6\u30ab\u30c6\u30b4\u30ea\u3092\u6301\u3061\u3001\u305d\u306e\u30b5\u30d6\u30ab\u30c6\u30b4\u30ea\u304c\u3055\u3089\u306b\u30b5\u30d6\u30b5\u30d6\u30ab\u30c6\u30b4\u30ea\u3092\u6301\u3061\u5f97\u308b\uff08\u7121\u9650\u306b\u307e\u3067\uff09\u5834\u5408\u3001\u3069\u3046\u306a\u308b\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n<p>\u6a19\u6e96\u7684\u306a\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30e2\u30c7\u30eb\u306f\u53ef\u5909\u306e\u6df1\u3055\u306b\u5bfe\u5fdc\u3059\u308b\u306e\u304c\u56f0\u96e3\u3067\u3059\u3002\u30d5\u30e9\u30c3\u30c8\u30c6\u30fc\u30d6\u30eb\u3067\u306f\u3001\u4efb\u610f\u306e\u9577\u3055\u306e\u30d1\u30b9\u3092\u7c21\u5358\u306b\u683c\u7d0d\u3067\u304d\u307e\u305b\u3093\u3002\u3053\u308c\u3092\u89e3\u6c7a\u3059\u308b\u306b\u306f\u3001\u968e\u5c64\u3092\u660e\u793a\u7684\u306b\u683c\u7d0d\u3059\u308b\u3088\u3046\u306b\u30b9\u30ad\u30fc\u30de\u3092\u8abf\u6574\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30a2\u30fc\u30ad\u30c6\u30af\u30c8\u304c\u3053\u308c\u3092\u9054\u6210\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3059\u308b\u4e3b\u306a\u30d1\u30bf\u30fc\u30f3\u306f3\u3064\u3042\u308a\u307e\u3059\uff1a<\/p>\n<ul>\n<li><strong>\u96a3\u63a5\u30ea\u30b9\u30c8\uff1a<\/strong> \u5b50\u30ec\u30b3\u30fc\u30c9\u5185\u306b\u89aa\u306eID\u3092\u683c\u7d0d\u3059\u308b\u3002<\/li>\n<li><strong>\u30cd\u30b9\u30c8\u30bb\u30c3\u30c8\uff1a<\/strong> \u7bc4\u56f2\u3092\u5b9a\u7fa9\u3059\u308b\u305f\u3081\u306b\u5de6\u5024\u3068\u53f3\u5024\u3092\u5272\u308a\u5f53\u3066\u308b\u3002<\/li>\n<li><strong>\u30d1\u30b9\u5217\u6319\uff1a<\/strong> \u30eb\u30fc\u30c8\u304b\u3089\u73fe\u5728\u306e\u30ce\u30fc\u30c9\u307e\u3067\u306e\u5b8c\u5168\u306a\u30d1\u30b9\u3092\u683c\u7d0d\u3059\u308b\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udd17 \u96a3\u63a5\u30ea\u30b9\u30c8\u30e2\u30c7\u30eb<\/h2>\n<p>\u96a3\u63a5\u30ea\u30b9\u30c8\u306f\u3001\u6a19\u6e96\u306eERD\u3067\u968e\u5c64\u3092\u8868\u73fe\u3059\u308b\u6700\u3082\u4e00\u822c\u7684\u3067\u76f4\u611f\u7684\u306a\u65b9\u6cd5\u3067\u3059\u3002\u3053\u308c\u306f\u81ea\u5df1\u53c2\u7167\u95a2\u4fc2\u306b\u4f9d\u5b58\u3057\u3066\u3044\u307e\u3059\u3002\u3064\u307e\u308a\u30011\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u81ea\u8eab\u306e\u4e3b\u30ad\u30fc\u3092\u53c2\u7167\u3059\u308b\u30ab\u30e9\u30e0\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/p>\n<h3>\ud83d\udcd0 \u30b9\u30ad\u30fc\u30de\u69cb\u9020<\/h3>\n<p>\u3053\u306e\u30e2\u30c7\u30eb\u3067\u306f\u3001\u30c7\u30fc\u30bf\u3092\u4fdd\u6301\u3059\u308b1\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u5404\u884c\u306f\u30c4\u30ea\u30fc\u5185\u306e\u30ce\u30fc\u30c9\u3092\u8868\u3057\u307e\u3059\u3002\u91cd\u8981\u306a\u8ffd\u52a0\u9805\u76ee\u306f\u3001\u901a\u5e38<code>parent_id<\/code>\u307e\u305f\u306f<code>ancestor_id<\/code>\u3068\u3044\u3046\u540d\u524d\u306e\u30ab\u30e9\u30e0\u3067\u3001\u89aa\u30ce\u30fc\u30c9\u306e\u56fa\u6709\u8b58\u5225\u5b50\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002\u30ce\u30fc\u30c9\u304c\u968e\u5c64\u306e\u6700\u4e0a\u4f4d\u306b\u3042\u308b\u5834\u5408\u306f\u3001\u3053\u306e\u30ab\u30e9\u30e0\u306b\u306fnull\u5024\u304c\u5165\u308a\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30c6\u30fc\u30d6\u30eb\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<code>\u90e8\u9580<\/code>:<\/p>\n<ul>\n<li><strong>id\uff1a<\/strong> \u90e8\u9580\u306e\u56fa\u6709\u306e\u4e3b\u30ad\u30fc\u3002<\/li>\n<li><strong>name\uff1a<\/strong> \u90e8\u9580\u306e\u8868\u793a\u540d\u3002<\/li>\n<li><strong>parent_id\uff1a<\/strong> \u4e0a\u4f4d\u90e8\u9580\u306eID\uff08\u30c8\u30c3\u30d7\u30ec\u30d9\u30eb\u3067\u306fnull\u53ef\uff09<\/li>\n<\/ul>\n<h3>\u2705 \u512a\u4f4d\u70b9<\/h3>\n<ul>\n<li><strong>\u30b7\u30f3\u30d7\u30eb\u3055\uff1a<\/strong> \u30b9\u30ad\u30fc\u30de\u306f\u76f4\u611f\u7684\u3067\u3001\u958b\u767a\u8005\u3084\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u8005\u306b\u3068\u3063\u3066\u7406\u89e3\u3057\u3084\u3059\u3044\u3002<\/li>\n<li><strong>\u67d4\u8edf\u6027\uff1a<\/strong>\u90e8\u5206\u6728\u306e\u79fb\u52d5\u306f\u7c21\u5358\u3067\u3059\u3002\u30eb\u30fc\u30c8\u30ce\u30fc\u30c9\u306e<code>parent_id<\/code>\u3092\u66f4\u65b0\u3059\u308c\u3070\u3088\u3044\u3002<\/li>\n<li><strong>\u6b63\u898f\u5316\uff1a<\/strong> \u30c7\u30fc\u30bf\u306e\u91cd\u8907\u304c\u306a\u3044\u305f\u3081\u3001\u7b2c\u4e09\u6b63\u898f\u5f62\uff083NF\uff09\u3092\u9069\u5207\u306b\u9075\u5b88\u3057\u3066\u3044\u308b\u3002<\/li>\n<\/ul>\n<h3>\u274c \u52a3\u4f4d\u70b9<\/h3>\n<ul>\n<li><strong>\u30af\u30a8\u30ea\u306e\u8907\u96d1\u3055\uff1a<\/strong> \u3059\u3079\u3066\u306e\u5b50\u5b6b\u3092\u53d6\u5f97\u3059\u308b\u306b\u306f\u518d\u5e30\u30af\u30a8\u30ea\u307e\u305f\u306f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5074\u306e\u51e6\u7406\u304c\u5fc5\u8981\u3068\u306a\u308b\u3002<\/li>\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\uff1a<\/strong> \u7279\u5b9a\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u6226\u7565\u3084\u518d\u5e30\u7684\u5171\u901a\u30c6\u30fc\u30d6\u30eb\u5f0f\uff08CTE\uff09\u304c\u306a\u3051\u308c\u3070\u3001\u6df1\u3044\u8d70\u67fb\u306f\u9045\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/li>\n<li><strong>\u53c2\u7167\u6574\u5408\u6027\uff1a<\/strong> \u5916\u90e8\u30ad\u30fc\u306f\u5f79\u7acb\u3064\u304c\u3001\u5236\u7d04\u304c\u53b3\u5bc6\u306b\u9069\u7528\u3055\u308c\u306a\u3044\u5834\u5408\u3001\u5faa\u74b0\u53c2\u7167\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/li>\n<\/ul>\n<h2>\ud83c\udf32 \u30cd\u30b9\u30c8\u30bb\u30c3\u30c8\u30e2\u30c7\u30eb<\/h2>\n<p>\u30cd\u30b9\u30c8\u30bb\u30c3\u30c8\u30e2\u30c7\u30eb\u306f\u6728\u69cb\u9020\u3092\u533a\u9593\u306e\u96c6\u5408\u306b\u5909\u63db\u3059\u308b\u3002\u89aa\u30dd\u30a4\u30f3\u30bf\u3092\u8ffd\u8de1\u3059\u308b\u4ee3\u308f\u308a\u306b\u3001\u5404\u30ce\u30fc\u30c9\u306b\u306f2\u3064\u306e\u6570\u5024\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u308b\u3002<code>left<\/code> \u304a\u3088\u3073 <code>right<\/code>\u3002\u3053\u308c\u3089\u306e\u5024\u306f\u3001\u6728\u306e\u524d\u9806\u8d70\u67fb\u306b\u304a\u3051\u308b\u30ce\u30fc\u30c9\u306e\u4f4d\u7f6e\u3092\u8868\u3059\u3002<\/p>\n<h3>\ud83d\udcd0 \u30b9\u30ad\u30fc\u30de\u69cb\u9020<\/h3>\n<p>\u30eb\u30fc\u30c8\u30ce\u30fc\u30c9\u304c\u5168\u4f53\u306e\u96c6\u5408\u3067\u3042\u308b\u6728\u3092\u60f3\u50cf\u3057\u3066\u307b\u3057\u3044\u3002\u6728\u3092\u8d70\u67fb\u3059\u308b\u969b\u3001\u30ab\u30a6\u30f3\u30bf\u30921\u305a\u3064\u5897\u52a0\u3055\u305b\u308b\u3002\u30ce\u30fc\u30c9\u306b\u5165\u308b\u3068\u3001\u73fe\u5728\u306e\u30ab\u30a6\u30f3\u30c8\u3092<code>left<\/code>\u3068\u3057\u3066\u8a18\u9332\u3059\u308b\u3002\u305d\u306e\u30ce\u30fc\u30c9\u3068\u3059\u3079\u3066\u306e\u5b50\u30ce\u30fc\u30c9\u306e\u51e6\u7406\u304c\u7d42\u4e86\u3057\u305f\u6642\u70b9\u3067\u3001\u30ab\u30a6\u30f3\u30c8\u3092<code>right<\/code>\u3068\u3057\u3066\u8a18\u9332\u3059\u308b\u3002<code>right<\/code> \u5024\u306f\u5e38\u306b\u305d\u308c\u3088\u308a\u5927\u304d\u3044<code>\u5de6<\/code> \u5024\u3002<\/p>\n<p>A <code>\u30ab\u30c6\u30b4\u30ea<\/code> \u30c6\u30fc\u30d6\u30eb\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n<ul>\n<li><strong>id\uff1a<\/strong> \u4e00\u610f\u306e\u8b58\u5225\u5b50\u3002<\/li>\n<li><strong>\u540d\u524d\uff1a<\/strong> \u30ab\u30c6\u30b4\u30ea\u540d\u3002<\/li>\n<li><strong>lft\uff1a<\/strong> \u5de6\u5883\u754c\u5024\u3002<\/li>\n<li><strong>rgt\uff1a<\/strong> \u53f3\u5883\u754c\u5024\u3002<\/li>\n<\/ul>\n<h3>\u2705 \u512a\u4f4d\u70b9<\/h3>\n<ul>\n<li><strong>\u9ad8\u901f\u53d6\u5f97\uff1a<\/strong> \u30b5\u30d6\u30c4\u30ea\u30fc\u3092\u53d6\u5f97\u3059\u308b\u306b\u306f\u3001\u5358\u7d14\u306a\u7bc4\u56f2\u30af\u30a8\u30ea\u3092\u4f7f\u7528\u3057\u3066<code>BETWEEN<\/code> \u8ad6\u7406\u3092\u4f7f\u7528\u3059\u308b\u3002<\/li>\n<li><strong>\u52b9\u7387\u6027\uff1a<\/strong> \u96a3\u63a5\u30ea\u30b9\u30c8\u3068\u6bd4\u8f03\u3057\u3066\u3001\u5927\u898f\u6a21\u3067\u6df1\u3044\u6728\u69cb\u9020\u306b\u304a\u3044\u3066\u8aad\u307f\u53d6\u308a\u6027\u80fd\u304c\u512a\u308c\u3066\u3044\u308b\u3002<\/li>\n<\/ul>\n<h3>\u274c \u52a3\u4f4d\u70b9<\/h3>\n<ul>\n<li><strong>\u66f8\u304d\u8fbc\u307f\u30b3\u30b9\u30c8\uff1a<\/strong> \u30ce\u30fc\u30c9\u306e\u633f\u5165\u3084\u79fb\u52d5\u306f\u9ad8\u30b3\u30b9\u30c8\u3067\u3042\u308b\u3002\u4ed6\u306e\u591a\u304f\u306e\u30ce\u30fc\u30c9\u306e<code>lft<\/code> \u304a\u3088\u3073<code>rgt<\/code> \u5024\u3092\u66f4\u65b0\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u533a\u9593\u306e\u6574\u5408\u6027\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u3067\u3042\u308b\u3002<\/li>\n<li><strong>\u8907\u96d1\u6027\uff1a<\/strong> \u5c02\u7528\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u30b5\u30dd\u30fc\u30c8\u304c\u306a\u3051\u308c\u3070\u3001\u8ad6\u7406\u306e\u5b9f\u88c5\u3084\u30c7\u30d0\u30c3\u30b0\u304c\u56f0\u96e3\u3067\u3042\u308b\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udee3\ufe0f \u30d1\u30b9\u5217\u6319\u3068\u30de\u30c6\u30ea\u30a2\u30e9\u30a4\u30ba\u30c9\u30d1\u30b9<\/h2>\n<p>\u30d1\u30b9\u5217\u6319\u6cd5\u306f\u3001\u30ce\u30fc\u30c9\u306e\u7956\u5148\u95a2\u4fc2\u3092\u6587\u5b57\u5217\u307e\u305f\u306f\u533a\u5207\u308a\u30ea\u30b9\u30c8\u3068\u3057\u3066\u4fdd\u5b58\u3059\u308b\u3002\u3053\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u306f\u3057\u3070\u3057\u3070\u30de\u30c6\u30ea\u30a2\u30e9\u30a4\u30ba\u30c9\u30d1\u30b9\u30d1\u30bf\u30fc\u30f3\u3068\u547c\u3070\u308c\u308b\u3002\u3053\u308c\u306f\u96a3\u63a5\u30ea\u30b9\u30c8\u306e\u30b7\u30f3\u30d7\u30eb\u3055\u3068\u30d1\u30b9\u306e\u53ef\u8aad\u6027\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u3082\u306e\u3067\u3042\u308b\u3002<\/p>\n<h3>\ud83d\udcd0 \u30b9\u30ad\u30fc\u30de\u69cb\u9020<\/h3>\n<p>\u3053\u306e\u30e2\u30c7\u30eb\u3067\u306f\u3001\u5404\u30ec\u30b3\u30fc\u30c9\u304c\u30eb\u30fc\u30c8\u304b\u3089\u306e\u5b8c\u5168\u306a\u30d1\u30b9\u3092\u4fdd\u5b58\u3059\u308b\u3002\u4f8b\u3048\u3070\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u30e2\u30c7\u30eb\u3067\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u304c\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30d1\u30b9\u6587\u5b57\u5217\u3092\u6301\u3064\u3053\u3068\u304c\u3042\u308b\u3002<code>\/home\/user\/documents\/report.txt<\/code>\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u306f\u3001\u3053\u306e\u60c5\u5831\u306f\u3057\u3070\u3057\u3070\u30ab\u30e9\u30e0\u5185\u306e\u533a\u5207\u308a\u6587\u5b57\u5217\u3068\u3057\u3066\u4fdd\u5b58\u3055\u308c\u308b\u3002\u305f\u3068\u3048\u3070\u3001<code>1\/5\/12\/<\/code>.<\/p>\n<p>\u30c6\u30fc\u30d6\u30eb\u306b\u306f\u4ee5\u4e0b\u306e\u9805\u76ee\u304c\u542b\u307e\u308c\u308b\uff1a<\/p>\n<ul>\n<li><strong>id\uff1a<\/strong> \u4e3b\u30ad\u30fc\u3002<\/li>\n<li><strong>path\uff1a<\/strong> \u7956\u5148\u95a2\u4fc2\u3092\u8868\u3059\u6587\u5b57\u5217\u3002<\/li>\n<li><strong>depth\uff1a<\/strong> \u30ce\u30fc\u30c9\u306e\u6df1\u3055\uff08\u4f55\u6bb5\u968e\u4e0b\u306b\u3042\u308b\u304b\uff09\u3092\u793a\u3059\u6574\u6570\u3002<\/li>\n<\/ul>\n<h3>\u2705 \u512a\u4f4d\u70b9<\/h3>\n<ul>\n<li><strong>\u7c21\u5358\u306a\u8d70\u67fb\uff1a<\/strong> \u30d1\u30b9\u306e\u63a5\u982d\u8f9e\u3068\u4e00\u81f4\u3055\u305b\u308b\u3053\u3068\u3067\u3001\u3059\u3079\u3066\u306e\u5b50\u5b6b\u3092\u691c\u7d22\u3067\u304d\u308b\u3002<\/li>\n<li><strong>\u53ef\u8aad\u6027\uff1a<\/strong> \u30c7\u30fc\u30bf\u306f\u4eba\u9593\u304c\u8aad\u307f\u3084\u3059\u304f\u3001\u30c7\u30d0\u30c3\u30b0\u3082\u5bb9\u6613\u3067\u3042\u308b\u3002<\/li>\n<li><strong>\u4e26\u3079\u66ff\u3048\uff1a<\/strong> \u30d1\u30b9\u6587\u5b57\u5217\u306b\u57fa\u3065\u3044\u3066\u4e26\u3079\u66ff\u3048\u308b\u3068\u3001\u81ea\u7136\u306b\u6b63\u3057\u3044\u6728\u69cb\u9020\u306e\u9806\u5e8f\u304c\u5f97\u3089\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u3002<\/li>\n<\/ul>\n<h3>\u274c \u52a3\u4f4d\u70b9<\/h3>\n<ul>\n<li><strong>\u30b9\u30c8\u30ec\u30fc\u30b8\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\uff1a<\/strong> \u9577\u3044\u30d1\u30b9\u306f\u3001\u5927\u304d\u306a\u30b9\u30c8\u30ec\u30fc\u30b8\u5bb9\u91cf\u3092\u6d88\u8cbb\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/li>\n<li><strong>\u6587\u5b57\u5217\u89e3\u6790\uff1a<\/strong> \u30af\u30a8\u30ea\u306f\u3057\u3070\u3057\u3070\u6587\u5b57\u5217\u64cd\u4f5c\u95a2\u6570\u3092\u5fc5\u8981\u3068\u3057\u3001\u6574\u6570\u6bd4\u8f03\u3088\u308a\u3082\u9045\u304f\u306a\u308b\u3053\u3068\u304c\u3042\u308b\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udcca \u6bd4\u8f03\u5206\u6790<\/h2>\n<p>\u9069\u5207\u306a\u30e2\u30c7\u30eb\u3092\u9078\u3076\u306b\u306f\u3001\u8aad\u307f\u8fbc\u307f\u5bfe\u66f8\u304d\u8fbc\u307f\u306e\u6bd4\u7387\u3068\u968e\u5c64\u306e\u6df1\u3055\u306b\u5927\u304d\u304f\u4f9d\u5b58\u3059\u308b\u3002\u4ee5\u4e0b\u306e\u8868\u306f\u5404\u624b\u6cd5\u306e\u7279\u5fb4\u3092\u6982\u8aac\u3057\u3066\u3044\u308b\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u7279\u5fb4<\/th>\n<th>\u96a3\u63a5\u30ea\u30b9\u30c8<\/th>\n<th>\u30cd\u30b9\u30c8\u30bb\u30c3\u30c8<\/th>\n<th>\u30de\u30c6\u30ea\u30a2\u30e9\u30a4\u30ba\u30c9\u30d1\u30b9<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u8aad\u307f\u53d6\u308a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/strong><\/td>\n<td>\u4f4e\uff5e\u4e2d\u7a0b\u5ea6<\/td>\n<td>\u9ad8<\/td>\n<td>\u4e2d\uff5e\u9ad8<\/td>\n<\/tr>\n<tr>\n<td><strong>\u66f8\u304d\u8fbc\u307f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/strong><\/td>\n<td>\u9ad8<\/td>\n<td>\u4f4e<\/td>\n<td>\u4e2d<\/td>\n<\/tr>\n<tr>\n<td><strong>\u5b9f\u88c5\u306e\u8907\u96d1\u3055<\/strong><\/td>\n<td>\u4f4e<\/td>\n<td>\u9ad8<\/td>\n<td>\u4e2d<\/td>\n<\/tr>\n<tr>\n<td><strong>\u6df1\u3044\u6728\u69cb\u9020\u3092\u30b5\u30dd\u30fc\u30c8<\/strong><\/td>\n<td>\u306f\u3044<\/td>\n<td>\u306f\u3044<\/td>\n<td>\u306f\u3044\uff08\u5236\u9650\u4ed8\u304d\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u30af\u30a8\u30ea\u8ad6\u7406<\/strong><\/td>\n<td>\u518d\u5e30\u7684<\/td>\n<td>\u7bc4\u56f2\u30b9\u30ad\u30e3\u30f3<\/td>\n<td>\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u30de\u30c3\u30c1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u2699\ufe0f \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u95a2\u3059\u308b\u8003\u616e\u4e8b\u9805<\/h2>\n<p>\u968e\u5c64\u69cb\u9020\u3092\u30e2\u30c7\u30eb\u5316\u3059\u308b\u969b\u306b\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a8\u30f3\u30b8\u30f3\u304c\u30c7\u30fc\u30bf\u3092\u3069\u306e\u3088\u3046\u306b\u6271\u3046\u304b\u3092\u691c\u8a0e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u9078\u629e\u3057\u305f\u30e2\u30c7\u30eb\u306b\u95a2\u308f\u3089\u305a\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u6226\u7565\u306f\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u96a3\u63a5\u30ea\u30b9\u30c8\uff1a<\/strong> \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092 <code>parent_id<\/code> \u5217\u3092\u91cd\u70b9\u7684\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5316\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u5168\u30c6\u30fc\u30d6\u30eb\u3092\u30b9\u30ad\u30e3\u30f3\u305b\u305a\u306b\u7279\u5b9a\u306e\u30ce\u30fc\u30c9\u306e\u3059\u3079\u3066\u306e\u5b50\u3092\u8fc5\u901f\u306b\u691c\u7d22\u3067\u304d\u307e\u3059\u3002<\/li>\n<li><strong>\u30cd\u30b9\u30c8\u30bb\u30c3\u30c8\uff1a<\/strong> \u4e21\u65b9\u3068\u3082\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8cbc\u308b <code>lft<\/code> \u3068 <code>rgt<\/code> . \u30b3\u30f3\u30dd\u30b8\u30c3\u30c8\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u7bc4\u56f2\u30af\u30a8\u30ea\u3092\u5927\u5e45\u306b\u6700\u9069\u5316\u3067\u304d\u307e\u3059\u3002<\/li>\n<li><strong>\u30de\u30c6\u30ea\u30a2\u30e9\u30a4\u30ba\u30c9\u30d1\u30b9\uff1a<\/strong> \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8cbc\u308b <code>path<\/code> \u5217\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u3088\u3063\u3066\u306f\u3001\u30b5\u30d6\u30c4\u30ea\u30fc\u306e\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306b\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u52b9\u679c\u7684\u3067\u3042\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udee0\ufe0f \u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3068\u66f4\u65b0<\/h2>\n<p>\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306f\u9759\u7684\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u7d44\u7e54\u304c\u6210\u9577\u3059\u308b\u306b\u3064\u308c\u3066\u3001\u968e\u5c64\u69cb\u9020\u3082\u5909\u5316\u3057\u307e\u3059\u3002\u30ce\u30fc\u30c9\u30921\u3064\u306e\u679d\u304b\u3089\u5225\u306e\u679d\u306b\u79fb\u52d5\u3059\u308b\u3053\u3068\u306f\u4e00\u822c\u7684\u306a\u64cd\u4f5c\u3067\u3042\u308a\u3001\u5404\u30e2\u30c7\u30eb\u306b\u7570\u306a\u308b\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002<\/p>\n<h3>\ud83d\udd04 \u30ce\u30fc\u30c9\u306e\u79fb\u52d5<\/h3>\n<p> \u306b\u304a\u3044\u3066\u3001<strong>\u96a3\u63a5\u30ea\u30b9\u30c8<\/strong>\u3001\u30ce\u30fc\u30c9\u306e\u79fb\u52d5\u306f\u5358\u4e00\u306e\u66f4\u65b0\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u3067\u884c\u3048\u307e\u3059\u3002\u30eb\u30fc\u30c8\u30ce\u30fc\u30c9\u306e <code>parent_id<\/code> \u3092\u5909\u66f4\u3057\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u5faa\u74b0\u53c2\u7167\u304c\u4f5c\u3089\u308c\u306a\u3044\u3088\u3046\u306b\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p> \u306b\u304a\u3044\u3066\u3001<strong>\u30cd\u30b9\u30c8\u30bb\u30c3\u30c8<\/strong>\u30e2\u30c7\u30eb\u3067\u306f\u3001\u30ce\u30fc\u30c9\u306e\u79fb\u52d5\u306f\u8907\u96d1\u3067\u3059\u3002\u79fb\u52d5\u5148\u306e\u30b5\u30d6\u30c4\u30ea\u30fc\u5185\u306e\u3059\u3079\u3066\u306e\u30ce\u30fc\u30c9\u306b\u3064\u3044\u3066\u3001<code>lft<\/code> \u3068 <code>rgt<\/code> \u306e\u5024\u3092\u518d\u8a08\u7b97\u3057\u3066\u3001\u79fb\u52d5\u30ce\u30fc\u30c9\u306e\u305f\u3081\u306e\u30b9\u30da\u30fc\u30b9\u3092\u78ba\u4fdd\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u901a\u5e38\u3001\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u66f4\u65b0\u3092\u4f34\u3046\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u64cd\u4f5c\u3067\u3059\u3002<\/p>\n<p> \u306b\u304a\u3044\u3066\u3001<strong>\u30de\u30c6\u30ea\u30a2\u30e9\u30a4\u30ba\u30c9\u30d1\u30b9<\/strong>\u30e2\u30c7\u30eb\u3067\u306f\u3001\u79fb\u52d5\u3057\u305f\u30ce\u30fc\u30c9\u304a\u3088\u3073\u305d\u306e\u3059\u3079\u3066\u306e\u5b50\u5b6b\u306e\u30d1\u30b9\u6587\u5b57\u5217\u3092\u66f4\u65b0\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u5404\u5b50\u5b6b\u306e\u30d1\u30b9\u3092\u66f4\u65b0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u305f\u3081\u3001\u5927\u304d\u306a\u30c4\u30ea\u30fc\u3067\u306f\u91cd\u3044\u66f8\u304d\u8fbc\u307f\u64cd\u4f5c\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>\ud83c\udfaf \u30c7\u30fc\u30bf\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n<p>ERD\u304c\u4fdd\u5b88\u53ef\u80fd\u3067\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u512a\u308c\u308b\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u3001\u968e\u5c64\u69cb\u9020\u3092\u5b9f\u88c5\u3059\u308b\u969b\u306f\u4ee5\u4e0b\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306b\u5f93\u3063\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<ul>\n<li><strong>\u660e\u78ba\u306a\u547d\u540d\u898f\u5247\u3092\u4f7f\u7528\u3059\u308b\uff1a<\/strong> \u4e00\u822c\u7684\u306a\u540d\u524d such as <code>col1<\/code>\u3002\u4f7f\u7528 <code>parent_id<\/code>, <code>ancestor_id<\/code>, <code>lft<\/code>\u3001\u307e\u305f\u306f <code>rgt<\/code>\u660e\u793a\u7684\u306b\u3002<\/li>\n<li><strong>\u5236\u7d04\u3092\u5f37\u5236\u3059\u308b\uff1a<\/strong> \u5186\u53c2\u7167\u3092\u9632\u3050\u305f\u3081\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u5236\u7d04\u3092\u4f7f\u7528\u3059\u308b\u3002\u30ce\u30fc\u30c9\u306f\u81ea\u5206\u81ea\u8eab\u306e\u7956\u5148\u306b\u306a\u308c\u306a\u3044\u3002<\/li>\n<li><strong>\u6df1\u3055\u3092\u5236\u9650\u3059\u308b\uff1a<\/strong> \u6280\u8853\u7684\u306b\u306f\u53ef\u80fd\u3060\u304c\u3001\u6975\u3081\u3066\u6df1\u3044\u968e\u5c64\u69cb\u9020\uff08\u4f8b\uff1a10\u6bb5\u4ee5\u4e0a\uff09\u306f\u8a2d\u8a08\u4e0a\u306e\u6b20\u9665\u3092\u793a\u3059\u3053\u3068\u304c\u591a\u3044\u3002\u53ef\u80fd\u306a\u5834\u5408\u306f\u69cb\u9020\u3092\u5e73\u5766\u5316\u3059\u308b\u3053\u3068\u3092\u691c\u8a0e\u3059\u308b\u3002<\/li>\n<li><strong>\u9078\u629e\u3092\u6587\u66f8\u5316\u3059\u308b\uff1a<\/strong> \u3053\u308c\u3089\u306e\u30d1\u30bf\u30fc\u30f3\u306f\u6a19\u6e96\u306eSQL\u6a5f\u80fd\u3067\u306f\u306a\u3044\u305f\u3081\u3001\u30b9\u30ad\u30fc\u30de\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306b\u3069\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u304b\u3092\u6587\u66f8\u5316\u3059\u308b\u3002<\/li>\n<li><strong>\u30cf\u30a4\u30d6\u30ea\u30c3\u30c9\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u691c\u8a0e\u3059\u308b\uff1a<\/strong> \u4e00\u90e8\u306e\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u96a3\u63a5\u30ea\u30b9\u30c8\u3068\u30de\u30c6\u30ea\u30a2\u30e9\u30a4\u30ba\u30c9\u30d1\u30b9\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u3001\u8aad\u307f\u53d6\u308a\u3068\u66f8\u304d\u8fbc\u307f\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u30d0\u30e9\u30f3\u30b9\u3055\u305b\u308b\u3002<\/li>\n<\/ul>\n<h2>\ud83e\udde0 \u9069\u5207\u306a\u6226\u7565\u306e\u9078\u629e<\/h2>\n<p>\u3059\u3079\u3066\u306e\u30b7\u30ca\u30ea\u30aa\u306b\u5bfe\u3057\u3066\u552f\u4e00\u306e\u300c\u6b63\u3057\u3044\u300d\u7b54\u3048\u304c\u3042\u308b\u308f\u3051\u3067\u306f\u306a\u3044\u3002\u6c7a\u5b9a\u306f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5177\u4f53\u7684\u306a\u8981\u4ef6\u306b\u304b\u304b\u3063\u3066\u3044\u308b\u3002<\/p>\n<ul>\n<li><strong>\u96a3\u63a5\u30ea\u30b9\u30c8\u3092\u9078\u629e\u3059\u308b\u5834\u5408\uff1a<\/strong> \u30c7\u30fc\u30bf\u306e\u5909\u66f4\u304c\u983b\u7e41\u3067\u3042\u308a\u3001\u968e\u5c64\u306e\u6df1\u3055\u304c\u4e2d\u7a0b\u5ea6\u3067\u3042\u308b\u3002\u3053\u308c\u306f\u307b\u3068\u3093\u3069\u306e\u6c4e\u7528\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u3068\u3063\u3066\u6700\u3082\u5b89\u5168\u306a\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u3042\u308b\u3002<\/li>\n<li><strong>\u30cd\u30b9\u30c8\u30bb\u30c3\u30c8\u3092\u9078\u629e\u3059\u308b\u5834\u5408\uff1a<\/strong> \u30c7\u30fc\u30bf\u306e\u79fb\u52d5\u304c\u307b\u3068\u3093\u3069\u306a\u3044\u8aad\u307f\u8fbc\u307f\u4e2d\u5fc3\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u3042\u308a\u3001\u5927\u898f\u6a21\u306a\u90e8\u5206\u6728\u3092\u8fc5\u901f\u306b\u53d6\u5f97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/li>\n<li><strong>\u30de\u30c6\u30ea\u30a2\u30e9\u30a4\u30ba\u30c9\u30d1\u30b9\u3092\u9078\u629e\u3059\u308b\u5834\u5408\uff1a<\/strong> \u4eba\u9593\u304c\u8aad\u307f\u3084\u3059\u3044\u30d1\u30b9\uff08URL\u306a\u3069\uff09\u304c\u5fc5\u8981\u3067\u3042\u308a\u3001\u968e\u5c64\u306e\u6df1\u3055\u304c\u6bd4\u8f03\u7684\u6d45\u3044\u3002<\/li>\n<\/ul>\n<p> \u3053\u308c\u3089\u306e\u69cb\u9020\u7684\u306a\u30cb\u30e5\u30a2\u30f3\u30b9\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u30b9\u30b1\u30fc\u30e9\u30d6\u30eb\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u304c\u53ef\u80fd\u306b\u306a\u308b\u3002\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u56f3\u306b\u9069\u5207\u306a\u30d1\u30bf\u30fc\u30f3\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u3067\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u3092\u901a\u3058\u3066\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3001\u30a2\u30af\u30bb\u30b9\u6027\u3001\u52b9\u7387\u6027\u3092\u78ba\u4fdd\u3067\u304d\u308b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u3001\u30c6\u30fc\u30d6\u30eb\u3068\u884c\u306e\u69cb\u9020\u306b\u57fa\u3065\u3044\u3066\u304a&hellip;<\/p>\n","protected":false},"author":1,"featured_media":1524,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"ER\u56f3\u306b\u304a\u3051\u308b\u968e\u5c64\u30c7\u30fc\u30bf\u306e\u30e2\u30c7\u30ea\u30f3\u30b0 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