{"id":6416,"date":"2024-08-25T11:18:32","date_gmt":"2024-08-25T02:18:32","guid":{"rendered":"https:\/\/taitan916.info\/blog\/?p=6416"},"modified":"2024-05-26T13:29:54","modified_gmt":"2024-05-26T04:29:54","slug":"post-6416","status":"publish","type":"post","link":"https:\/\/taitan916.info\/blog\/archives\/6416","title":{"rendered":"MySQL\u306eRANK\u53ca\u3073DENSE_RANK\u95a2\u6570\u3092\u7528\u3044\u3066\u30e9\u30f3\u30ad\u30f3\u30b0\u3092\u5b9f\u88c5\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"

\u30e9\u30f3\u30ad\u30f3\u30b0\u6a5f\u80fd\u3092\u5b9f\u88c5\u3059\u308b\u969b\u3001\u4e0a\u4f4d\u3007\u4f4d\u307e\u3067\u306e\u30c7\u30fc\u30bf\u3092MySQL\u304b\u3089\u6301\u3063\u3066\u304d\u3066\u9806\u4f4d\u4ed8\u3051\u306fPHP\u5074\u3067\u884c\u3063\u3066\u3044\u305f\u3002\u305f\u3060\u3001MySQL8\u304b\u3089\u306fRANK\u53ca\u3073DENSE_RANK\u3068\u3044\u3046\u95a2\u6570\u304c\u5b9f\u88c5\u3055\u308c\u3001\u3053\u3061\u3089\u3092\u7528\u3044\u308b\u3053\u3068\u3067MySQL\u306e\u307f\u3067\u5bfe\u5fdc\u3067\u304d\u308b\u307f\u305f\u3044\u3002\u4ee5\u4e0b\u306b\u5bfe\u5fdc\u65b9\u6cd5\u3092\u30e1\u30e2\u3002<\/p>\n

 <\/p>\n

\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9<\/h2>\n

RANK<\/h3>\n

https:\/\/dev.mysql.com\/doc\/refman\/8.0\/ja\/window-function-descriptions.html#function_rank<\/a><\/p>\n

DENSE_RANK<\/h3>\n

https:\/\/dev.mysql.com\/doc\/refman\/8.0\/ja\/window-function-descriptions.html#function_dense-rank<\/a><\/p>\n

 <\/p>\n

\u30c6\u30fc\u30d6\u30eb\u60c5\u5831<\/h2>\n

\u30c6\u30fc\u30d6\u30eb\u69cb\u9020<\/h3>\n
mysql> SHOW COLUMNS FROM `test_table`;\r\n+-------+--------------+------+-----+---------+----------------+\r\n| Field | Type         | Null | Key | Default | Extra          |\r\n+-------+--------------+------+-----+---------+----------------+\r\n| id    | int          | NO   | PRI | NULL    | auto_increment |\r\n| name  | varchar(255) | NO   |     | NULL    |                |\r\n| score | int          | NO   |     | NULL    |                |\r\n+-------+--------------+------+-----+---------+----------------+<\/pre>\n
\u30c7\u30fc\u30bf\u5185\u5bb9<\/h3>\n
mysql> SELECT * FROM `test_table`;\r\n+----+-----------+-------+\r\n| id | name      | score |\r\n+----+-----------+-------+\r\n|  1 | \u9234\u6728      |    50 |\r\n|  2 | \u5c71\u7530      |    60 |\r\n|  3 | \u4f50\u3005\u6728    |    70 |\r\n|  4 | \u4f50\u85e4      |    40 |\r\n|  5 | \u6e21\u8fba      |    60 |\r\n|  6 | \u9ad8\u6a4b      |    80 |\r\n+----+-----------+-------+<\/pre>\n
 <\/p>\n
\u5b9f\u88c5\u65b9\u6cd5<\/h2>\n
\u540c\u7387\u9806\u4f4d\u304c\u3042\u3063\u305f\u5834\u5408\u3001\u6b21\u306e\u9806\u4f4d\u306f\uff0b2\u3068\u3059\u308b\u5834\u5408(RANK)<\/h3>\n
SELECT *, RANK() OVER (ORDER BY `score`) AS `rank` \r\nFROM `test_table`;\r\n\r\n+----+-----------+-------+------+\r\n| id | name      | score | rank |\r\n+----+-----------+-------+------+\r\n|  4 | \u4f50\u85e4      |    40 |    1 |\r\n|  1 | \u9234\u6728      |    50 |    2 |\r\n|  2 | \u5c71\u7530      |    60 |    3 |\r\n|  5 | \u6e21\u8fba      |    60 |    3 |\r\n|  3 | \u4f50\u3005\u6728    |    70 |    5 |\r\n|  6 | \u9ad8\u6a4b      |    80 |    6 |\r\n+----+-----------+-------+------+<\/pre>\n
\u540c\u7387\u9806\u4f4d\u304c\u3042\u3063\u3066\u3082\u6b21\u306e\u9806\u4f4d\u306f+1\u3068\u3059\u308b\u5834\u5408(DENSE_RANK)<\/h3>\n
SELECT *, DENSE_RANK() OVER (ORDER BY `score`) AS `rank` \r\nFROM `test_table`;\r\n\r\n+----+-----------+-------+------+\r\n| id | name      | score | rank |\r\n+----+-----------+-------+------+\r\n|  4 | \u4f50\u85e4      |    40 |    1 |\r\n|  1 | \u9234\u6728      |    50 |    2 |\r\n|  2 | \u5c71\u7530      |    60 |    3 |\r\n|  5 | \u6e21\u8fba      |    60 |    3 |\r\n|  3 | \u4f50\u3005\u6728    |    70 |    4 |\r\n|  6 | \u9ad8\u6a4b      |    80 |    5 |\r\n+----+-----------+-------+------+<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u30e9\u30f3\u30ad\u30f3\u30b0\u6a5f\u80fd\u3092\u5b9f\u88c5\u3059\u308b\u969b\u3001\u4e0a\u4f4d\u3007\u4f4d\u307e\u3067\u306e\u30c7\u30fc\u30bf\u3092MySQL\u304b\u3089\u6301\u3063\u3066\u304d\u3066\u9806\u4f4d\u4ed8 ... <\/p>\n","protected":false},"author":1,"featured_media":1072,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5,66],"tags":[],"class_list":["post-6416","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mysql","category-database"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t