{"id":55403,"date":"2024-04-09T17:16:00","date_gmt":"2024-04-09T08:16:00","guid":{"rendered":"https:\/\/kinsta.com\/jp\/?p=55403&#038;post_type=knowledgebase&#038;preview_id=55403"},"modified":"2025-10-02T04:44:41","modified_gmt":"2025-10-01T19:44:41","slug":"indexing-in-mysql-mariadb","status":"publish","type":"post","link":"https:\/\/kinsta.com\/jp\/blog\/indexing-in-mysql-mariadb\/","title":{"rendered":"\u3010\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u6700\u9069\u5316\u3011MySQL\u3068MariaDB\u3067\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u6d3b\u7528\u65b9\u6cd5"},"content":{"rendered":"<p>MySQL\u3068MariaDB\u306f\u3001\u3069\u3061\u3089\u3082B\u6728\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u52b9\u7387\u6027\u3092\u30b7\u30fc\u30e0\u30ec\u30b9\u306b\u6d3b\u7528\u3057\u3001\u30c7\u30fc\u30bf\u64cd\u4f5c\u3092\u6700\u9069\u5316\u3057\u307e\u3059\u3002\u3053\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30e1\u30ab\u30cb\u30ba\u30e0\u306f\u3001\u8fc5\u901f\u306a\u30c7\u30fc\u30bf\u691c\u7d22\u3001\u30af\u30a8\u30ea\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u5411\u4e0a\u3001\u30c7\u30a3\u30b9\u30afI\/O\u306e\u6700\u5c0f\u5316\u3092\u5b9f\u73fe\u3057\u3001\u5fdc\u7b54\u6027\u306e\u9ad8\u3044\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u4f53\u9a13\u306b\u8ca2\u732e\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4eca\u56de\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u4f5c\u6210\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u3054\u8aac\u660e\u3057\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/mariadb-vs-mysql\/\">MySQL\u307e\u305f\u306fMariaDB<\/a>\u3067\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u3088\u308a\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3059\u308b\u30d2\u30f3\u30c8\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<div><\/div><kinsta-auto-toc heading=\"Table of Contents\" exclude=\"last\" list-style=\"arrow\" selector=\"h2\" count-number=\"-1\"><\/kinsta-auto-toc>\n<h2>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3068\u306f<\/h2>\n<p>MySQL\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u7279\u5b9a\u306e\u60c5\u5831\u3092\u30af\u30a8\u30ea\u3059\u308b\u3068\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30c6\u30fc\u30d6\u30eb\u306e\u5404\u884c\u304b\u3089\u8a72\u5f53\u3059\u308b\u30c7\u30fc\u30bf\u304c\u63a2\u3057\u51fa\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u898f\u6a21\u304c\u5927\u304d\u3051\u308c\u3070\u5927\u304d\u3044\u307b\u3069\u6642\u9593\u3092\u8981\u3059\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u8005\u306f\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f7f\u3063\u3066\u30c7\u30fc\u30bf\u691c\u7d22\u30d7\u30ed\u30bb\u30b9\u3092\u9ad8\u901f\u5316\u3057\u3001\u30af\u30a8\u30ea\u306e\u52b9\u7387\u3092\u6700\u9069\u5316\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u4f5c\u6210\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u3092\u4f53\u7cfb\u7684\u306b\u6574\u7406\u3059\u308b\u3053\u3068\u3067\u3001\u691c\u7d22\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u30c7\u30fc\u30bf\u91cf\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3001\u8fc5\u901f\u304b\u3064\u52b9\u679c\u7684\u306b\u30af\u30a8\u30ea\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u5177\u4f53\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u4ee5\u4e0b\u306e\u300c<strong>Customer<\/strong>\u300d\u30c6\u30fc\u30d6\u30eb\u3067\u3001\u540d\u524d\u304c<code>Ava<\/code>\u306e\u9867\u5ba2\u3092\u691c\u7d22\u3057\u305f\u3044\u3068\u3057\u307e\u3059\u3002<\/p>\n<figure style=\"width: 1600px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2024\/02\/mysql-workbench.jpg\" alt=\"MySQL Workbench\u3067Customer\u30c6\u30fc\u30d6\u30eb\u3092\u30d7\u30ec\u30d3\u30e5\u30fc\" width=\"1600\" height=\"225\"><figcaption class=\"wp-caption-text\">MySQL Workbench\u3067Customer\u30c6\u30fc\u30d6\u30eb\u3092\u30d7\u30ec\u30d3\u30e5\u30fc\u3059\u308b<\/figcaption><\/figure>\n<p><strong>first_name<\/strong>\u5217\u306bB\u6728\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8ffd\u52a0\u3057\u3001\u5bfe\u8c61\u306e\u60c5\u5831\u3092\u3088\u308a\u52b9\u7387\u7684\u306b\u691c\u7d22\u3067\u304d\u308b\u69cb\u9020\u304c\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u69cb\u9020\u306f\u3001\u30eb\u30fc\u30c8\u30ce\u30fc\u30c9\u3092\u9802\u70b9\u306b\u679d\u5206\u304b\u308c\u3057\u3001\u6700\u4e0b\u5c64\u306b\u306f\u30ea\u30fc\u30d5\uff08\u8449\uff09\u30ce\u30fc\u30c9\u304c\u304f\u308b\u305f\u3081\u3001\u6728\u306e\u3088\u3046\u306a\u69cb\u9020\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u69cb\u9020\u3067\u306f\u3001\u5404\u968e\u5c64\u304c\u30c7\u30fc\u30bf\u306e\u30bd\u30fc\u30c8\u9806\u306b\u57fa\u3065\u3044\u3066\u691c\u7d22\u3092\u8a98\u5c0e\u3057\u307e\u3059\u3002<\/p>\n<p>B\u6728\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u691c\u7d22\u30d1\u30b9\u3092\u56f3\u306b\u8868\u3059\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<figure style=\"width: 1600px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2024\/02\/b-tree-index-search-path.png\" alt=\"Customer\u30c6\u30fc\u30d6\u30eb\u306eB-Tree\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\" width=\"1600\" height=\"225\"><figcaption class=\"wp-caption-text\">Customer\u30c6\u30fc\u30d6\u30eb\u306eB\u6728\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/figcaption><\/figure>\n<p>\u5148\u307b\u3069\u306e\u4f8b\u306b\u623b\u308a\u3001<code>Ava<\/code>\u306f\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\uff08A-Z\uff09\u306e\u6607\u9806\u3067\u6700\u521d\u306b\u3001<code>William<\/code>\u306f\u6700\u5f8c\u306b\u4f4d\u7f6e\u3057\u3066\u3044\u307e\u3059\u3002B\u6728\u3067\u306f\u3001\u30ea\u30b9\u30c8\u306e\u4e2d\u592e\u306e\u5024\u304c\u30eb\u30fc\u30c8\u30ce\u30fc\u30c9\u3068\u3057\u3066\u6307\u5b9a\u3055\u308c\u307e\u3059\u3002\u4e0a\u306e\u4f8b\u3067\u306f\u3001<code>Michael<\/code>\u304c\u30eb\u30fc\u30c8\u30ce\u30fc\u30c9\u306b\u306a\u308a\u307e\u3059\u3002\u30eb\u30fc\u30c8\u30ce\u30fc\u30c9\u3092\u9802\u70b9\u306b\u679d\u5206\u304b\u308c\u3057\u3001<code>Michael<\/code>\u306e\u5de6\u3068\u53f3\u306b\u5024\u304c\u4e26\u3073\u307e\u3059\u3002<\/p>\n<p>\u6728\u306e\u968e\u5c64\u3092\u4e0b\u308b\u306b\u3064\u308c\u3066\u3001\u5404\u30ce\u30fc\u30c9\u306b\u306f\u3001\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\u9806\u306b\u4e26\u3093\u3060\u540d\u524d\u3092\u691c\u7d22\u3059\u308b\u305f\u3081\u306e\u30ad\u30fc\uff08\u5143\u306e\u30c7\u30fc\u30bf\u884c\u3078\u306e\u76f4\u63a5\u30ea\u30f3\u30af\uff09\u304c\u5897\u3048\u3066\u3044\u304d\u307e\u3059\u3002\u6700\u5f8c\u306b\u30ea\u30fc\u30d5\u30ce\u30fc\u30c9\u3067\u3059\u3079\u3066\u306e\u9867\u5ba2\u306e\u540d\u306e\u30c7\u30fc\u30bf\u304c\u63c3\u3044\u307e\u3059\u3002<\/p>\n<p>\u691c\u7d22\u30d7\u30ed\u30bb\u30b9\u306f\u3001\u307e\u305a<code>Ava<\/code>\u3092\u30eb\u30fc\u30c8\u30ce\u30fc\u30c9\u3067\u3042\u308b<code>Michael<\/code>\u3068\u6bd4\u8f03\u3059\u308b\u3053\u3068\u304b\u3089\u59cb\u307e\u308a\u307e\u3059\u3002<code>Ava<\/code>\u306f\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\u9806\u3067<code>Michael<\/code>\u3088\u308a\u3082\u524d\u306b\u3042\u308b\u3068\u5224\u65ad\u3057\u3066\u3001\u5de6\u306b\u79fb\u52d5\u3057\u307e\u3059\u3002\u305d\u308c\u304b\u3089\u5de6\u306e\u30ce\u30fc\u30c9\u306b\u7d9a\u304f<code>Emily<\/code>\u3001<code>Daniel<\/code>\u3001\u305d\u3057\u3066<code>Ava<\/code>\u306b\u9032\u307f\u3001<code>Ava<\/code>\u306e\u60c5\u5831\u3092\u542b\u3080\u30ea\u30fc\u30d5\u30ce\u30fc\u30c9\u306b\u5230\u9054\u3057\u307e\u3059\u3002<\/p>\n<p>B\u6728\u306f\u3001\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u30b7\u30b9\u30c6\u30e0\u306e\u7c21\u6613\u7248\u3068\u3057\u3066\u6a5f\u80fd\u3057\u3001\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u5185\u306e\u3059\u3079\u3066\u306e\u540d\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u691c\u7d22\u3092\u7279\u5b9a\u306e\u5834\u6240\u306b\u52b9\u7387\u7684\u306b\u8a98\u5c0e\u3057\u307e\u3059\u3002\u3088\u304f\u6574\u5099\u3055\u308c\u305f\u9053\u3092\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u3092\u8003\u616e\u3057\u3066\u8a2d\u7f6e\u3055\u308c\u305f\u6a19\u8b58\u306b\u5f93\u3044\u3001\u76ee\u7684\u306e\u30c7\u30fc\u30bf\u306b\u8ff7\u3046\u3053\u3068\u306a\u304f\u305f\u3069\u308a\u7740\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u7a2e\u985e<\/h2>\n<p>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u76ee\u7684\u306b\u5fdc\u3058\u305f\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>1. \u5358\u4e00\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/h3>\n<p>\u5358\u4e00\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u30ad\u30fc\u3068\u30c6\u30fc\u30d6\u30eb\u30c7\u30fc\u30bf\u3092\u5bfe\u5fdc\u3065\u3051\u307e\u3059\u3002\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5185\u306e\u5404\u30ad\u30fc\u306f\u30011\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u884c\u306b\u5bfe\u5fdc\u3057\u307e\u3059\u3002<\/p>\n<p><strong>customer_id<\/strong>\u5217\u306f\u3001<strong>Customer<\/strong>\u30c6\u30fc\u30d6\u30eb\u306e\u4e3b\u30ad\u30fc\u3067\u3001\u5358\u4e00\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002\u30ad\u30fc\u306f\u5404\u9867\u5ba2\u3092\u8b58\u5225\u3057\u3001\u30c6\u30fc\u30d6\u30eb\u5185\u306e\u5404\u9867\u5ba2\u306e\u60c5\u5831\u3092\u30ea\u30f3\u30af\u3057\u307e\u3059\u3002<\/p>\n<table>\n<tbody>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\uff08<strong>customer_id<\/strong>\uff09<\/td>\n<td colspan=\"1\" rowspan=\"1\">\u884c\u30dd\u30a4\u30f3\u30bf<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">1<\/td>\n<td colspan=\"1\" rowspan=\"1\">\u884c1<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">2<\/td>\n<td colspan=\"1\" rowspan=\"1\">\u884c2<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">3<\/td>\n<td colspan=\"1\" rowspan=\"1\">\u884c3<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">4<\/td>\n<td colspan=\"1\" rowspan=\"1\">\u884c4<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\u2026<\/td>\n<td colspan=\"1\" rowspan=\"1\">\u2026<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001<strong>customer_id<\/strong>\u30ad\u30fc\u3068\u500b\u3005\u306e\u9867\u5ba2\u60c5\u5831\u306e\u95a2\u4fc2\u6027\u306f\u30b7\u30f3\u30d7\u30eb\u3067\u3059\u3002\u884c\u6570\uff08\u3042\u308b\u3044\u306f\u660e\u78ba\u306a\u5024\u3092\u6301\u3064\u5217\uff09\u306e\u5c11\u306a\u3044\u30c6\u30fc\u30d6\u30eb\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002<strong>status<\/strong>\u3084<strong>category<\/strong>\u306e\u3088\u3046\u306a\u5217\u304c\u826f\u3044\u5019\u88dc\u3067\u3059\u3002<\/p>\n<p>\u5358\u4e00\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u3001\u5358\u4e00\u306e\u5217\u306b\u57fa\u3065\u3044\u3066\u7279\u5b9a\u306e\u884c\u3092\u691c\u7d22\u3059\u308b\u5358\u7d14\u306a\u30af\u30a8\u30ea\u306b\u4f7f\u7528\u3059\u308b\u305f\u3081\u3001\u5b9f\u88c5\u306f\u30b7\u30f3\u30d7\u30eb\u3067\u308f\u304b\u308a\u3084\u3059\u304f\u3001\u5c0f\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067\u306f\u52b9\u7387\u7684\u3067\u3059\u3002<\/p>\n<h3>2. \u8907\u6570\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/h3>\n<p>\u7d44\u7e54\u7684\u306a\u30c7\u30fc\u30bf\u691c\u7d22\u5411\u3051\u306e\u5358\u4e00\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3068\u306f\u7570\u306a\u308a\u3001\u8907\u6570\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u968e\u5c64\u69cb\u9020\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u8907\u6570\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u306f\u3001\u8907\u6570\u306e\u691c\u7d22\u65b9\u91dd\u304c\u3042\u308a\u3001\u4e0a\u5c64\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u4e0b\u5c64\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u691c\u7d22\u3092\u8a98\u5c0e\u3057\u3001\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3059\u308b\u30ea\u30fc\u30d5\u30ce\u30fc\u30c9\u306b\u9054\u3059\u308b\u307e\u3067\u691c\u7d22\u304c\u7e70\u308a\u8fd4\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u69cb\u9020\u306b\u3088\u308a\u3001\u691c\u7d22\u6642\u306b\u6c42\u3081\u3089\u308c\u308b\u6bd4\u8f03\u306e\u56de\u6570\u3092\u6e1b\u3089\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><strong>address<\/strong>\u5217\u3068<strong>customer_id<\/strong>\u5217\u3092\u6301\u3064\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f8b\u306b\u6319\u3052\u3066\u307f\u307e\u3059\u3002<\/p>\n<table>\n<tbody>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\uff08<strong>address<\/strong>\uff09<\/td>\n<td colspan=\"1\" rowspan=\"1\">\u30b5\u30d6\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\uff08<strong>customer_id<\/strong>\uff09<\/td>\n<td colspan=\"1\" rowspan=\"1\">\u884c\u30dd\u30a4\u30f3\u30bf<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">123 Main St<\/td>\n<td colspan=\"1\" rowspan=\"1\">1<\/td>\n<td colspan=\"1\" rowspan=\"1\">\u884c1<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">456 Oak Ave<\/td>\n<td colspan=\"1\" rowspan=\"1\">2<\/td>\n<td colspan=\"1\" rowspan=\"1\">\u884c2<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">789 Pine Rd<\/td>\n<td colspan=\"1\" rowspan=\"1\">3<\/td>\n<td colspan=\"1\" rowspan=\"1\">\u884c3<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\u2026<\/td>\n<td colspan=\"1\" rowspan=\"1\">\u2026<\/td>\n<td colspan=\"1\" rowspan=\"1\">\u2026<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u7b2c1\u968e\u5c64\u306f\u4f4f\u6240\u3092\u6574\u7406\u3057\u3001\u7b2c2\u968e\u5c64\u306f\u5404\u4f4f\u6240\u306e\u4e2d\u3067\u3055\u3089\u306b\u9867\u5ba2ID\u3092\u6574\u7406\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u69cb\u6210\u306f\u3001\u6574\u7406\u3055\u308c\u305f\u691c\u7d22\u968e\u5c64\u304c\u6c42\u3081\u3089\u308c\u308b\u5e83\u7bc4\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001<strong>last_name<\/strong>\u306e\u3088\u3046\u306b\u30ab\u30fc\u30c7\u30a3\u30ca\u30ea\u30c6\u30a3\uff08\u7279\u5b9a\u306e\u5217\u306e\u30c7\u30fc\u30bf\u5024\u306e\u4e00\u610f\u6027\uff09\u304c\u4e2d\u7a0b\u5ea6\u306e\u5217\u306b\u3082\u6709\u7528\u3067\u3059\u3002<\/p>\n<h3>3. \u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/h3>\n<p><a href=\"https:\/\/kinsta.com\/jp\/blog\/list-mysql-databases\/\">MySQL<\/a>\u306e\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u8ad6\u7406\u7684\u306a\u9806\u5e8f\u3068\u30c6\u30fc\u30d6\u30eb\u5185\u306e\u30c7\u30fc\u30bf\u306e\u9806\u5e8f\u3092\u6307\u793a\u3057\u307e\u3059\u3002<strong>Customer<\/strong>\u30c6\u30fc\u30d6\u30eb\u306e<strong>customer_id<\/strong>\u5217\u306b\u9069\u7528\u3059\u308b\u3068\u3001\u5217\u306e\u5024\u306b\u57fa\u3065\u3044\u3066\u884c\u304c\u30bd\u30fc\u30c8\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u30c6\u30fc\u30d6\u30eb\u5185\u306e\u30c7\u30fc\u30bf\u306e\u9806\u5e8f\u304c\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u9806\u5e8f\u3092\u53cd\u6620\u3059\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u3001\u30c7\u30a3\u30b9\u30afI\/O\u3092\u524a\u6e1b\u3059\u308b\u3053\u3068\u3067\u3001\u7279\u5b9a\u306e\u30d1\u30bf\u30fc\u30f3\u306b\u5bfe\u3059\u308b\u30c7\u30fc\u30bf\u691c\u7d22\u3092\u9ad8\u901f\u5316\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u624b\u6cd5\u306f\u3001\u30c7\u30fc\u30bf\u691c\u7d22\u30d1\u30bf\u30fc\u30f3\u304c\u9867\u5ba2ID\u306e\u9806\u5e8f\u3068\u4e00\u81f4\u3057\u3066\u3044\u308b\u5834\u5408\u306b\u6709\u52b9\u3067\u3059\u3002\u307e\u305f\u3001<strong>customer_id<\/strong>\u306e\u3088\u3046\u306b\u30ab\u30fc\u30c7\u30a3\u30ca\u30ea\u30c6\u30a3\u306e\u9ad8\u3044\u5217\u306b\u3082\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u3001\u7279\u5b9a\u306e\u30d1\u30bf\u30fc\u30f3\u306b\u5bfe\u3059\u308b\u30c7\u30fc\u30bf\u691c\u7d22\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u304a\u3044\u3066\u5229\u70b9\u306f\u3042\u308a\u307e\u3059\u304c\u3001\u6f5c\u5728\u7684\u306a\u843d\u3068\u3057\u7a74\u3082\u3002\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u57fa\u3065\u3044\u3066\u884c\u3092\u30bd\u30fc\u30c8\u3059\u308b\u3068\u3001\u7279\u306b\u633f\u5165\u3084\u66f4\u65b0\u306e\u30d1\u30bf\u30fc\u30f3\u304c\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u9806\u5e8f\u3068\u4e00\u81f4\u3057\u306a\u3044\u5834\u5408\u3001\u633f\u5165\u3084\u66f4\u65b0\u64cd\u4f5c\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30bd\u30fc\u30c8\u3055\u308c\u305f\u9806\u5e8f\u3092\u7dad\u6301\u3057\u306a\u304c\u3089\u30c7\u30fc\u30bf\u3092\u633f\u5165\u307e\u305f\u306f\u66f4\u65b0\u3059\u308b\u3053\u3068\u3067\u3001\u8ca0\u8377\u304c\u5897\u52a0\u3059\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n<h3>4. \u975e\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/h3>\n<p>\u975e\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u69cb\u9020\u306b\u67d4\u8edf\u6027\u3092\u3082\u305f\u3089\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001<strong>email<\/strong>\u5217\u306b\u9069\u7528\u3059\u308b\u3068\u3001\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3068\u306f\u7570\u306a\u308a\u3001\u30c6\u30fc\u30d6\u30eb\u5185\u306e\u30a8\u30f3\u30c8\u30ea\u306e\u9806\u5e8f\u306f\u5909\u66f4\u3055\u308c\u307e\u305b\u3093\u3002<\/p>\n<p>\u4ee3\u308f\u308a\u306b\u3001\u30ad\u30fc\uff08\u3053\u306e\u5834\u5408\u306f\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\uff09\u3092\u30c7\u30fc\u30bf\u884c\u306b\u30de\u30c3\u30d7\u3059\u308b\u65b0\u305f\u306a\u69cb\u9020\u304c\u69cb\u7bc9\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u7279\u5b9a\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u554f\u3044\u5408\u308f\u305b\u308b\u3068\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u9806\u5e8f\u306b\u4f9d\u5b58\u3059\u308b\u3053\u3068\u306a\u304f\u95a2\u9023\u3059\u308b\u884c\u306b\u691c\u7d22\u3092\u8a98\u5c0e\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u5229\u70b9\u306f\u3001\u4fdd\u5b58\u3055\u308c\u305f\u30c7\u30fc\u30bf\u306b\u9806\u5e8f\u3092\u8ab2\u3059\u3053\u3068\u306a\u304f\u3001\u8907\u6570\u306e\u5217\u3092\u52b9\u7387\u7684\u306b\u691c\u7d22\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u30c6\u30fc\u30d6\u30eb\u306e\u4e3b\u9806\u5e8f\u306b\u5f93\u308f\u306a\u3044\u30af\u30a8\u30ea\u306b\u3082\u5bfe\u5fdc\u3067\u304d\u308b\u305f\u3081\u3001\u6c4e\u7528\u6027\u304c\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u975e\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u3001\u30c7\u30fc\u30bf\u306e\u691c\u7d22\u30d1\u30bf\u30fc\u30f3\u304c\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\u9806\u3068\u306f\u7570\u306a\u308b\u5834\u5408\u3084\u3001\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u3088\u3046\u306b\u4e2d\u7a0b\u5ea6\u304b\u3089\u9ad8\u3044\u30ab\u30fc\u30c7\u30a3\u30ca\u30ea\u30c6\u30a3\u3092\u6301\u3064\u5217\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f5c\u6210\u3059\u308b<\/h2>\n<p>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u3069\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3042\u308b\u304b\u3092\u7406\u89e3\u3057\u305f\u3089\u3001MySQL Workbench\u3092\u4f7f\u7528\u3057\u3066\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f5c\u6210\u3059\u308b\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>\u524d\u63d0\u6761\u4ef6<\/h3>\n<p>\u3053\u308c\u304b\u3089\u3054\u7d39\u4ecb\u3059\u308b\u624b\u9806\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3082\u306e\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>MySQL\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\uff08MariaDB\u3068\u4e92\u63db\u6027\u3042\u308a\uff09<\/li>\n<li>SQL\u3068MySQL\u306e\u4f7f\u7528\u7d4c\u9a13<\/li>\n<li><a href=\"https:\/\/www.mysql.com\/products\/workbench\/\" target=\"_blank\" rel=\"noopener noreferrer\">MySQL Workbench<\/a><\/li>\n<\/ul>\n<h3>Customer\u30c6\u30fc\u30d6\u30eb\u306e\u4f5c\u6210<\/h3>\n<ol start=\"1\">\n<li>MySQL Workbench\u3092\u8d77\u52d5\u3057\u3001MySQL\u30b5\u30fc\u30d0\u30fc\u306b\u63a5\u7d9a\u3057\u307e\u3059\u3002<\/li>\n<li>\u4ee5\u4e0b\u306eSQL\u30af\u30a8\u30ea\u3092\u5b9f\u884c\u3057\u3066<strong>Customer<\/strong>\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\n<pre><code class=\"language-sql\">CREATE TABLE Customer (\n    customer_id INT PRIMARY KEY,\n    first_name VARCHAR(50),\n    last_name VARCHAR(50),\n    email VARCHAR(100),\n    phone_number VARCHAR(15),\n    address VARCHAR(255)\n);<\/code><\/pre>\n<\/li>\n<li>\u4ee5\u4e0b\u306e\u30c7\u30fc\u30bf\u3092\u633f\u5165\u3057\u307e\u3059\u3002\n<pre><code class=\"language-sql\">-- Customer\u30c6\u30fc\u30d6\u30eb\u306b\u30c7\u30fc\u30bf\u3092\u8ffd\u52a0\nINSERT INTO Customer (customer_id, first_name, last_name, email, phone_number, address)\nVALUES\n    (1, 'John', 'Doe', 'john.doe@email.com', '123-456-7890', '123 Main St'),\n    (2, 'Jane', 'Smith', 'jane.smith@email.com', '987-654-3210', '456 Oak Ave'),\n    (3, 'Robert', 'Johnson', 'robert.johnson@email.com', '111-222-3333', '789 Pine Rd'),\n    (4, 'Emily', 'Williams', 'emily.williams@email.com', '555-666-7777', '101 Cedar Ln'),\n    (5, 'Michael', 'Brown', 'michael.brown@email.com', '444-555-8888', '202 Elm St'),\n    (6, 'Sophia', 'Davis', 'sophia.davis@email.com', '999-888-7777', '303 Maple Ave'),\n    (7, 'Daniel', 'Miller', 'daniel.miller@email.com', '777-888-9999', '404 Birch Rd'),\n    (8, 'Olivia', 'Jones', 'olivia.jones@email.com', '333-222-1111', '505 Pine St'),\n    (9, 'William', 'Wilson', 'william.wilson@email.com', '111-333-5555', '606 Oak Ln'),\n    (10, 'Ava', 'Moore', 'ava.moore@email.com', '888-777-6666', '707 Cedar Ave');<\/code><\/pre>\n<\/li>\n<\/ol>\n<h3>\u5358\u4e00\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/h3>\n<p>MySQL\u3068MariaDB\u3067\u30af\u30a8\u30ea\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3059\u308b\u65b9\u6cd5\u306e\u4e00\u3064\u3068\u3057\u3066\u3001\u5358\u4e00\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><strong>Customer<\/strong>\u30c6\u30fc\u30d6\u30eb\u306b\u5358\u4e00\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8ffd\u52a0\u3059\u308b\u306b\u306f\u3001<a href=\"https:\/\/dev.mysql.com\/doc\/refman\/8.0\/en\/create-index.html\"><code>CREATE INDEX<\/code>\u6587<\/a>\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-sql\">-- \"customer_id\"\u306b\u5bfe\u3059\u308b\u5358\u4e00\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f5c\u6210\nCREATE INDEX idx_customer_id ON Customer(customer_id);<\/code><\/pre>\n<p>\u6b63\u3057\u304f\u5b9f\u884c\u3055\u308c\u308b\u3068\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u304c\u8fd4\u3055\u308c\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u4f5c\u6210\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-sql\">0 row(s) affected Records: 0  Duplicates: 0 Warnings: 0<\/code><\/pre>\n<p>\u3053\u308c\u3067\u3001<strong>customer_id<\/strong>\u5217\u306e\u5024\u306b\u57fa\u3065\u3044\u3066\u30c7\u30fc\u30bf\u3092\u7d5e\u308a\u8fbc\u3080\u30af\u30a8\u30ea\u304c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u3088\u3063\u3066\u9069\u5207\u306b\u51e6\u7406\u3055\u308c\u3001\u52b9\u7387\u304c\u5927\u5e45\u306b\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n<h3>\u8907\u6570\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/h3>\n<p>MySQL\u3068MariaDB\u306f\u3001<a href=\"https:\/\/dev.mysql.com\/doc\/refman\/8.0\/en\/multiple-column-indexes.html\" target=\"_blank\" rel=\"noopener noreferrer\">\u8907\u6570\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/a>\u306b\u3088\u308a\u3001\u500b\u3005\u306e\u5217\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u62e1\u5f35\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u8907\u6570\u306e\u968e\u5c64\u3084\u5217\u306b\u307e\u305f\u304c\u308a\u3001\u8907\u6570\u306e\u5217\u306e\u5024\u30921\u3064\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u307e\u3068\u3081\u308b\u3053\u3068\u3067\u3001\u30af\u30a8\u30ea\u306e\u5b9f\u884c\u304c\u52b9\u7387\u7684\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001MySQL\u307e\u305f\u306fMariaDB \u3067\u3001<strong>address<\/strong>\u304a\u3088\u3073<strong>customer_id<\/strong>\u5217\u306b\u7126\u70b9\u3092\u5f53\u3066\u305f\u8907\u6570\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-sql\">-- \"address\"\u3068\"customer_id\"\u306b\u5bfe\u3059\u308b\u8907\u6570\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f5c\u6210\nCREATE INDEX idx_address_customer_id ON Customer(address, customer_id);<\/code><\/pre>\n<p>\u8907\u6570\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u3046\u307e\u304f\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u7279\u306b\u8907\u6570\u306e\u5217\u3092\u30bb\u30c3\u30c8\u3067\u6271\u3046\u5834\u5408\u3001\u30af\u30a8\u30ea\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5287\u7684\u306b\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n<h3>\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/h3>\n<p>MySQL\u3068MariaDB\u3067\u306f\u3001\u5358\u4e00\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3068\u8907\u6570\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u4ed6\u306b\u3001<a href=\"https:\/\/dev.mysql.com\/doc\/refman\/8.0\/en\/innodb-index-types.html\" target=\"_blank\" rel=\"noopener noreferrer\">\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/a>\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30c7\u30fc\u30bf\u884c\u3092\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u30dd\u30a4\u30f3\u30bf\u306e\u9806\u5e8f\u306b\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/wordpress-database-optimization\/\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/a>\u3092\u6539\u5584\u3059\u308b\u52d5\u7684\u306a\u9078\u629e\u80a2\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001<strong>Customer<\/strong>\u30c6\u30fc\u30d6\u30eb\u306e<strong>customer_id<\/strong>\u5217\u306b\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u9069\u7528\u3059\u308b\u3068\u3001\u9867\u5ba2ID\u306e\u9806\u5e8f\u304c\u63c3\u3044\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-sql\">-- \"customer_id\"\u306b\u5bfe\u3059\u308b\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f5c\u6210\nCREATE CLUSTERED INDEX idx_customer_id_clustered ON Customer(customer_id);<\/code><\/pre>\n<p>\u30c7\u30fc\u30bf\u306e\u9806\u5e8f\u304c\u6700\u9069\u5316\u3055\u308c\u308b\u305f\u3081\u3001\u30c7\u30a3\u30b9\u30afI\/O\u3092\u524a\u6e1b\u3057\u306a\u304c\u3089\u3001\u7279\u5b9a\u306e\u30d1\u30bf\u30fc\u30f3\u306e\u30c7\u30fc\u30bf\u691c\u7d22\u3092\u5927\u5e45\u306b\u6539\u5584\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>\u975e\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/h3>\n<p><a href=\"https:\/\/dev.mysql.com\/doc\/refman\/8.0\/en\/innodb-index-types.html\" target=\"_blank\" rel=\"noopener noreferrer\">\u975e\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/a>\u306f\u3001\u30c7\u30fc\u30bf\u3092\u7279\u5b9a\u306e\u9806\u5e8f\u306b\u5f37\u5236\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u5217\u306b\u5fdc\u3058\u3066\u30af\u30a8\u30ea\u3092\u6700\u9069\u5316\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002MySQL\u3068MariaDB\u3067\u306f\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u975e\u30af\u30e9\u30b9\u30bf\u5316\u3067\u3042\u308b\u3053\u3068\u3092\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u30c6\u30fc\u30d6\u30eb\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u304c\u305d\u308c\u3092\u793a\u5506\u3057\u3066\u304a\u308a\u3001\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u3001\u30d7\u30e9\u30a4\u30de\u30ea\u30ad\u30fc\u307e\u305f\u306f\u6700\u521d\u306e\u975eNULL\u306e\u30e6\u30cb\u30fc\u30af\u30ad\u30fc\u306e\u307f\u306b\u9069\u7528\u3055\u308c\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u305d\u306e\u4ed6\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u3059\u3079\u3066\u975e\u30af\u30e9\u30b9\u30bf\u5316\u3055\u308c\u307e\u3059\u3002\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre><code class=\"language-sql\">-- \"email\"\u306b\u5bfe\u3059\u308b\u975e\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f5c\u6210\nCREATE INDEX idx_email_non_clustered ON Customer(email);<\/code><\/pre>\n<p>\u975e\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6d3b\u7528\u3059\u308b\u3068\u3001\u8907\u6570\u306e\u5217\u3092\u52b9\u7387\u7684\u306b\u691c\u7d22\u3067\u304d\u308b\u305f\u3081\u3001\u3088\u308a\u591a\u6a5f\u80fd\u3067\u5fdc\u7b54\u6027\u306e\u9ad8\u3044\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u30d2\u30f3\u30c8<\/h3>\n<p>\u30b9\u30c6\u30fc\u30bf\u30b9\u3084\u30ab\u30c6\u30b4\u30ea\u306e\u3088\u3046\u306b\u3001\u7570\u306a\u308b\u5024\u306e\u7bc4\u56f2\u304c\u72ed\u3044\u5217\u3092\u6271\u3046\u5834\u5408\u306f\u3001\u5358\u4e00\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u304a\u3059\u3059\u3081\u3067\u3059\u3002\u307e\u305f\u3001\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u3088\u3046\u306b\u5024\u306e\u7bc4\u56f2\u304c\u5e83\u3044\u5217\u306b\u306f\u3001\u8907\u6570\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3068\u975e\u30af\u30e9\u30b9\u30bf\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<p>\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3068\u975e\u30af\u30e9\u30b9\u30bf\u5316\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u4f7f\u3044\u5206\u3051\u306f\u3001\u597d\u307f\u306e\u30c7\u30fc\u30bf\u691c\u7d22\u30d1\u30bf\u30fc\u30f3\u306b\u3088\u308a\u307e\u3059\u3002\u524d\u8005\u3067\u306f\u9867\u5ba2ID\u306e\u3088\u3046\u306a\u30ab\u30fc\u30c7\u30a3\u30ca\u30ea\u30c6\u30a3\u306e\u9ad8\u3044\u5217\u3092\u9078\u629e\u3057\u3001\u5f8c\u8005\u3067\u306f\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u3088\u3046\u306a\u4e2d\u7a0b\u5ea6\u304b\u3089\u9ad8\u5ea6\u306a\u30ab\u30fc\u30c7\u30a3\u30ca\u30ea\u30c6\u30a3\u3092\u6301\u3064\u5217\u3092\u9078\u629e\u3059\u308b\u306e\u304c\u30d9\u30b9\u30c8\u3067\u3059\u3002<\/p>\n<h2>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u6700\u9069\u5316<\/h2>\n<p>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5411\u4e0a\u306b\u306f\u3001\u30ab\u30d0\u30ea\u30f3\u30b0\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3001\u5197\u9577\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u524a\u9664\u3059\u308b\u306a\u3069\u306e\u5b9f\u8df5\u7684\u306a\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>1. \u30ab\u30d0\u30ea\u30f3\u30b0\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/h3>\n<p>\u30ab\u30d0\u30ea\u30f3\u30b0\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3068\u306f\u3001\u5fc5\u8981\u306a\u30c7\u30fc\u30bf\u3092\u3059\u3079\u3066\u7db2\u7f85\u3059\u308b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u3067\u3001\u30af\u30a8\u30ea\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5411\u4e0a\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u30af\u30a8\u30ea\u306b\u5fc5\u8981\u306a\u3059\u3079\u3066\u306e\u5217\u3092\u542b\u3080\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u884c\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5fc5\u8981\u304c\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-sql\">-- \"first_name\"\u3068\"last_name\"\u306b\u30ab\u30d0\u30ea\u30f3\u30b0\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f5c\u6210\nCREATE INDEX idx_covering_name ON Customer(first_name, last_name);<\/code><\/pre>\n<h3>2. \u5197\u9577\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u524a\u9664<\/h3>\n<p>\u5197\u9577\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u524a\u9664\u3082\u6709\u52b9\u3067\u3059\u304c\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u524a\u9664\u306f\u30af\u30a8\u30ea\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u614e\u91cd\u306b\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-sql\">-- \u4e0d\u8981\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u524a\u9664\nDROP INDEX idx_unnecessary_index ON Customer;<\/code><\/pre>\n<p>\u5b9a\u671f\u7684\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u898b\u76f4\u3057\u3001\u4e0d\u8981\u306a\u3082\u306e\u3092\u524a\u9664\u3059\u308b\u3053\u3068\u3067\u3001\u5408\u7406\u7684\u3067\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u69cb\u9020\u3092\u7dad\u6301\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>3. \u904e\u5270\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u907f\u3051\u308b<\/h3>\n<p>\u904e\u5270\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u907f\u3051\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u3001\u30af\u30a8\u30ea\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6539\u5584\u3057\u307e\u3059\u304c\u3001\u4f5c\u6210\u3057\u3059\u304e\u308b\u3068\u9006\u52b9\u679c\u3067\u3059\u3002\u30d0\u30e9\u30f3\u30b9\u3092\u898b\u306a\u304c\u3089\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u80a5\u5927\u5316\u3092\u56de\u907f\u3059\u308b\u3053\u3068\u304c\u5927\u5207\u3067\u3059\u3002\u30b9\u30c8\u30ec\u30fc\u30b8\u8981\u4ef6\u306e\u5897\u52a0\u3084\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u4f4e\u4e0b\u3092\u307e\u306d\u304f\u6050\u308c\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>4. \u30af\u30a8\u30ea\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u5206\u6790\u3059\u308b<\/h3>\n<p>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f5c\u6210\u3059\u308b\u524d\u306b\u3001\u30af\u30a8\u30ea\u30d1\u30bf\u30fc\u30f3\u306e\u5206\u6790\u3082\u304a\u5fd8\u308c\u306a\u304f\u3002\u983b\u7e41\u306b\u5b9f\u884c\u3055\u308c\u308b\u30af\u30a8\u30ea\u3092\u7406\u89e3\u3057\u3001<code>WHERE<\/code>\u3084<code>JOIN<\/code>\u3067\u4f7f\u7528\u3055\u308c\u308b\u5217\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u4f5c\u6210\u306b\u96c6\u4e2d\u3059\u308b\u3053\u3068\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u4eca\u56de\u306f\u3001MySQL\u3068MariaDB\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u4f5c\u6210\u306b\u3064\u3044\u3066\u3001B\u6728\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u52b9\u7387\u6027\u3092\u8ef8\u306b\u3054\u7d39\u4ecb\u3057\u307e\u3057\u305f\u3002\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u57fa\u672c\u60c5\u5831\u3068\u3001\u3055\u307e\u3056\u307e\u306a\u7a2e\u985e\uff08\u5358\u4e00\u5217\u3001\u8907\u6570\u5217\u3001\u30af\u30e9\u30b9\u30bf\u5316\u3001\u975e\u30af\u30e9\u30b9\u30bf\u5316\uff09\u3092\u53d6\u308a\u4e0a\u3052\u307e\u3057\u305f\u3002<\/p>\n<p>Kinsta\u3067\u306f\u3001MySQL\u3068MariaDB\u306e\u3069\u3061\u3089\u3082\u30b5\u30dd\u30fc\u30c8\u3002\u8aad\u307f\u53d6\u308a\u306e\u591a\u3044\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u3092\u6700\u9069\u5316\u3057\u305f\u3044\u65b9\u3001\u66f8\u304d\u8fbc\u307f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u305f\u3044\u65b9\u306b\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u8981\u4ef6\u306b\u5bfe\u5fdc\u3059\u308b\u4fe1\u983c\u6027\u306b\u512a\u308c\u305f\u9ad8\u6027\u80fd\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u3054\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002<a href=\"https:\/\/kinsta.com\/jp\/signup\/\">Kinsta\u306e\u30de\u30cd\u30fc\u30b8\u30c9\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b5\u30fc\u30d0\u30fc<\/a>\u3067\u3001MySQL\u3068MariaDB\u3001\u305d\u3057\u3066\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u6a5f\u80fd\u3092\u30d5\u30eb\u6d3b\u7528\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MySQL\u3068MariaDB\u306f\u3001\u3069\u3061\u3089\u3082B\u6728\u30a4\u30f3\u30c7\u30c3\u30af &#8230;<\/p>\n","protected":false},"author":199,"featured_media":55404,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kinsta_gated_content":false,"_kinsta_gated_content_redirect":"","footnotes":""},"tags":[],"topic":[790],"class_list":["post-55403","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","topic-mysql-database"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.6 (Yoast SEO v24.6) - 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content=\"https:\/\/www.facebook.com\/Kinsta-Japan-334616080691171\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-04-09T08:16:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-01T19:44:41+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/kinsta.com\/jp\/wp-content\/uploads\/sites\/6\/2024\/02\/mastering-indexing-in-mysql-mariadb.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1460\" \/>\n\t<meta property=\"og:image:height\" content=\"730\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Jeremy Holcombe\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:description\" 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