{"id":619,"date":"2007-06-22T09:23:50","date_gmt":"2007-06-22T00:23:50","guid":{"rendered":"http:\/\/www.kazu.tv\/blog\/?p=619"},"modified":"2007-06-22T09:23:50","modified_gmt":"2007-06-22T00:23:50","slug":"db","status":"publish","type":"post","link":"https:\/\/kazu.tv\/blog\/2007\/06\/22\/db\/","title":{"rendered":"DB\u3067\u30c4\u30ea\u30fc\u69cb\u9020"},"content":{"rendered":"<p>\u30b7\u30b9\u30c6\u30e0\u958b\u767a\uff1dWeb+DB\u3063\u3066\u8a00\u3063\u3066\u3082\u3044\u3044\u4f4dDB\u306f\u4e16\u306e\u4e2d\u306b\u666e\u53ca\u3057\u3066\u308b\u3002\u3053\u3053\u3067\u306eDB\u306fRDB\uff08\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\uff09\u3068\u3044\u3046\u30e4\u30c4\u3067\u3001\u8868\u5f62\u5f0f\u306e\u30c7\u30fc\u30bf\uff08\u30c6\u30fc\u30d6\u30eb\uff09\u3092\u8907\u6570\u6301\u3063\u3066\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30ad\u30fc\u3067\u8868\u540c\u58eb\u3092\u7d50\u5408\u3059\u308b\u3082\u306e\u3002<br \/>\n\u307e\u3001\u7d30\u304b\u3044\u8a71\u306f\u7f6e\u3044\u3068\u304f\u3068\u3057\u3066\u3001Excel\u3068\u304b\u3067\u6271\u3046\u3088\u3046\u306a\u4f4f\u6240\u9332\u3001\u5728\u5eab\u7ba1\u7406\u8868\u3068\u304b\u305d\u3046\u3044\u3063\u305f\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3059\u308b\u306e\u306b\u306f\u975e\u5e38\u306b\u5411\u3044\u3066\u3044\u308b\u3051\u3069\u3001\u6728\u69cb\u9020\u306e\u30c7\u30fc\u30bf\u3092\u6271\u3046\u306e\u306f\u3061\u3087\u3063\u3068\u7c21\u5358\u3067\u306f\u306a\u3044\u3002<br \/>\n\u25cb\u65b9\u6cd5\uff11<br \/>\n\u7c21\u5358\u306b\u601d\u3044\u3064\u304f\u65b9\u6cd5\u3068\u3057\u3066\u306f\u3001\u5404\u30ce\u30fc\u30c9\u30921\u30ec\u30b3\u30fc\u30c9\u3068\u3057\u3066\u4fdd\u5b58\u3057\u89aa\u30ce\u30fc\u30c9\u306eID\u3092\u89aa\u3078\u306e\u30ea\u30f3\u30af\u3068\u3057\u3066\u6301\u305f\u305b\u308b\u3084\u3064\u3002A\u306e\u4e0b\u306bB\u3068C\u3068\u3044\u3046\u5b50\u4f9b\u304c\u3044\u308b\u3068\u3059\u308b\u3068<\/p>\n<table>\n<tr>\n<td>ID<\/td>\n<td>\u30ce\u30fc\u30c9\u540d<\/td>\n<td>\u89aa\u306eID<\/td>\n<\/tr>\n<tr>\n<td>1<\/td>\n<td>A<\/td>\n<td>NULL<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>B<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>C<\/td>\n<td>1<\/td>\n<\/tr>\n<\/table>\n<p>\u7c21\u5358\u306b\u5b9f\u88c5\u3067\u304d\u308b\u53cd\u9762\u3001\u30ce\u30fc\u30c9\u306e\u524a\u9664\u304c\u7d50\u69cb\u9762\u5012\u3060\u3063\u305f\u308a\u3001\u968e\u5c64\u304c1\u6bb5\u968e\u5897\u3048\u308b\u305f\u3073\u306bLEFT JOIN\u30921\u3064\u5897\u3084\u3055\u306a\u304d\u3083\u3044\u3051\u306a\u3044\u7b49\u3001\u8272\u3005\u5236\u7d04\u3082\u3042\u308b\u3002\u3061\u306b\u307f\u306bAdjacency List Model\u3068\u3044\u3046\u3089\u3057\u3044\u3002<br \/>\n\u25cb\u65b9\u6cd52<br \/>\n\u3082\u3046\u4e00\u3064\u306e\u65b9\u6cd5\u306fNested Set Model\u3068\u3044\u3046\u3089\u3057\u3044\u3002<br \/>\n\u3053\u308c\u3089\u306e\u65b9\u6cd5\u306e\u8a73\u7d30\u306b\u95a2\u3057\u3066\u306f\u3053\u3053\u3067\u306f\u66f8\u304b\u306a\u3044\u3002\u3063\u3066\u3044\u3046\u304b<a href=\"http:\/\/www.mysql.gr.jp\/mysqlml\/mysql\/msg\/12071\" target=\"_blank\">\u3053\u306e\u30da\u30fc\u30b8<\/a>\u3092\u898b\u305f\u65b9\u304c\u5206\u304b\u308a\u3084\u3059\u3044\u3068\u601d\u3046\u3057\u3002\u539f\u6587\u306f<a href=\"http:\/\/dev.mysql.com\/tech-resources\/articles\/hierarchical-data.html\" target=\"_blank\">\u3053\u3063\u3061<\/a>\u3002\u8868\u3068\u304b\u306f\u539f\u6587\u306e\u65b9\u304c\u307f\u3084\u3059\u3044\u3002<\/p>\n<p><!--more--><br \/>\nDB\u3063\u3066\u3059\u3054\u3044\u4e00\u822c\u7684\u306b\u4f7f\u308f\u308c\u3066\u308b\u3051\u3069\u3001\u30c7\u30fc\u30bf\u69cb\u9020\u3068\u304b\u306b\u95a2\u3057\u3066\u3061\u3083\u3093\u3068\u77e5\u8b58\u3092\u6301\u3063\u3066\u3044\u308b\u4eba\u3063\u3066\u610f\u5916\u306b\u5c11\u306a\u3044\u3002\u307e\u3001\u305d\u3093\u306a\u4e8b\u8a00\u3063\u3066\u308b\u81ea\u5206\u3082Nested Set Model\u306f\u77e5\u3089\u306a\u304b\u3063\u305f\u8a33\u3060\u3051\u3069\u2026<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30b7\u30b9\u30c6\u30e0\u958b\u767a\uff1dWeb+DB\u3063\u3066\u8a00\u3063\u3066\u3082\u3044\u3044\u4f4dDB\u306f\u4e16\u306e\u4e2d\u306b\u666e\u53ca\u3057\u3066\u308b\u3002\u3053\u3053\u3067\u306eDB\u306fRDB\uff08\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\uff09\u3068\u3044\u3046\u30e4\u30c4\u3067\u3001\u8868\u5f62\u5f0f\u306e\u30c7\u30fc\u30bf\uff08\u30c6\u30fc\u30d6\u30eb\uff09\u3092\u8907\u6570\u6301\u3063\u3066\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30ad\u30fc\u3067\u8868\u540c\u58eb\u3092\u7d50\u5408\u3059\u308b\u3082\u306e\u3002 \u307e\u3001&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[8],"tags":[],"class_list":["post-619","post","type-post","status-publish","format-standard","hentry","category-8"],"_links":{"self":[{"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/posts\/619","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/comments?post=619"}],"version-history":[{"count":0,"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/posts\/619\/revisions"}],"wp:attachment":[{"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/media?parent=619"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/categories?post=619"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/tags?post=619"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}