{"id":28802,"date":"2022-11-14T18:30:07","date_gmt":"2023-10-15T06:53:32","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8%e6%89%a7%e8%a1%8c%e6%9f%a5%e8%af%a2%e4%b9%8b%e5%89%8d%e8%bf%9b%e8%a1%8c%e6%95%b0%e6%8d%ae%e7%ad%9b%e9%80%89-mysql%e3%80%82\/"},"modified":"2025-08-12T10:10:33","modified_gmt":"2025-08-12T02:10:33","slug":"%e5%9c%a8%e6%89%a7%e8%a1%8c%e6%9f%a5%e8%af%a2%e4%b9%8b%e5%89%8d%e8%bf%9b%e8%a1%8c%e6%95%b0%e6%8d%ae%e7%ad%9b%e9%80%89-mysql%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8%e6%89%a7%e8%a1%8c%e6%9f%a5%e8%af%a2%e4%b9%8b%e5%89%8d%e8%bf%9b%e8%a1%8c%e6%95%b0%e6%8d%ae%e7%ad%9b%e9%80%89-mysql%e3%80%82\/","title":{"rendered":"\u5728\u6267\u884c\u67e5\u8be2\u4e4b\u524d\u8fdb\u884c\u6570\u636e\u7b5b\u9009 (MySQL)"},"content":{"rendered":"

\u4e3a\u4ec0\u4e48\u4f60\u60f3\u8981\u505a\u90a3\u6837\u7684\u4e8b\u60c5\u5462\uff1f<\/h1>\n

\u67e5\u8be2\u8fd9\u4e2a\u5927\u7ea6\u6709120\u4e07\u884c\u7684\u8868\u65f6\uff0c\u82b1\u4e86\u5927\u7ea630\u5206\u949f\u7684\u65f6\u95f4\u3002
\n\u5728\u6307\u5b9a\u7684\u641c\u7d22\u6761\u4ef6\u5217\u4e0a\u6ca1\u6709\u521b\u5efa\u7d22\u5f15\u3002
\n\u56e0\u4e3a\u53ea\u8981\u80fd\u591f\u63d0\u53d6\u51fa\u4e00\u5b9a\u6570\u91cf\u6700\u8fd1\u7684\u6570\u636e\u5c31\u53ef\u4ee5\u4e86\uff0c\u6240\u4ee5\u73b0\u5728\u4f1a\u5148\u4f7f\u7528\u5df2\u7ecf\u521b\u5efa\u7d22\u5f15\u7684\u5217\u6765\u7b5b\u9009\u6570\u636e\uff0c\u7136\u540e\u518d\u6267\u884c\u67e5\u8be2\uff0c\u4ee5\u4fbf\u80fd\u591f\u66f4\u5feb\u5730\u83b7\u53d6\u7ed3\u679c\u3002<\/p>\n

2. \u68c0\u9a8c\u6761\u4ef6<\/h1>\n

\u30fbmysql\u7248\u672c\u4e3a15.1\u5206\u53d15.5.60-MariaDB
\n\u30fb\u521b\u5efa\u6d4b\u8bd5\u6570\u636e\u8bf7\u53c2\u8003\u4ee5\u4e0b\u94fe\u63a5\uff08\u7ea6400\u4e07\u884c\uff09
\nhttps:\/\/hacknote.jp\/archives\/29823\/<\/p>\n

MariaDB [testdata]> select * from item limit 10;\r\n+----+----------+--------------------------------+-------+---------------------+\r\n| id | name     | description                    | price | created_at          |\r\n+----+----------+--------------------------------+-------+---------------------+\r\n|  1 | \u5546\u54c11    | 114dcf1df424f20df52d9c3519f0eb |  2060 | 2014-04-19 09:10:26 |\r\n|  2 | \u5546\u54c12    | 8e8e0723e233352a433b3bd19056be |  4092 | 2014-05-09 08:00:23 |\r\n|  3 | \u5546\u54c13    | 2d6757249469b20c21e69029a62037 |  6562 | 2014-05-05 11:08:28 |\r\n|  4 | \u5546\u54c14    | 86471dd71d806267f90795e0b03ff5 |  9148 | 2014-05-23 04:51:02 |\r\n|  6 | \u5546\u54c16    | ffd69fd3852808f148c818c8bf4f08 |  6075 | 2014-01-21 17:21:25 |\r\n|  7 | \u5546\u54c17    | ceb66f2d0c8757af11ec02aac16ca5 |  2736 | 2014-04-01 16:32:49 |\r\n|  8 | \u5546\u54c18    | 2d8f9d8ffb7668c122c2deeabbb5d4 |  6374 | 2014-03-07 21:41:21 |\r\n|  9 | \u5546\u54c19    | 6ad922ec4c5ceb931b03adc7ed6a6a |  4347 | 2014-06-09 03:00:25 |\r\n| 13 | \u5546\u54c113   | b2da4cefd264e6da237865e6432917 |  4686 | 2014-03-20 18:34:54 |\r\n| 14 | \u5546\u54c114   | 64bfba2c8450aca731b513fd1b8ef8 |  4938 | 2014-05-21 09:55:24 |\r\n+----+----------+--------------------------------+-------+---------------------+\r\n10 rows in set (0.00 sec)\r\n\r\nMariaDB [testdata]>\r\n<\/code><\/pre>\n
MariaDB [testdata]> select count(*) from item;\r\n+----------+\r\n| count(*) |\r\n+----------+\r\n|  4194304 |\r\n+----------+\r\n1 row in set (14.00 sec)\r\n\r\nMariaDB [testdata]>\r\n<\/code><\/pre>\n
MariaDB [testdata]> desc item;\r\n+-------------+------------------+------+-----+---------+----------------+\r\n| Field       | Type             | Null | Key | Default | Extra          |\r\n+-------------+------------------+------+-----+---------+----------------+\r\n| id          | int(11)          | NO   | PRI | NULL    | auto_increment |\r\n| name        | varchar(10)      | YES  |     | NULL    |                |\r\n| description | varchar(30)      | YES  |     | NULL    |                |\r\n| price       | int(10) unsigned | YES  |     | NULL    |                |\r\n| created_at  | datetime         | YES  |     | NULL    |                |\r\n+-------------+------------------+------+-----+---------+----------------+\r\n5 rows in set (0.00 sec)\r\n\r\nMariaDB [testdata]>\r\n<\/code><\/pre>\n
MariaDB [testdata]> show index from item\\G\r\n*************************** 1. row ***************************\r\n        Table: item\r\n   Non_unique: 0\r\n     Key_name: PRIMARY\r\n Seq_in_index: 1\r\n  Column_name: id\r\n    Collation: A\r\n  Cardinality: 3861004\r\n     Sub_part: NULL\r\n       Packed: NULL\r\n         Null:\r\n   Index_type: BTREE\r\n      Comment:\r\nIndex_comment:\r\n1 row in set (0.00 sec)\r\n\r\nMariaDB [testdata]>\r\n<\/code><\/pre>\n
\u7531\u4e8eid\u662f\u4e3b\u952e\uff0c\u56e0\u6b64\u5b83\u88ab\u521b\u5efa\u4e86\u7d22\u5f15\u3002<\/p>\n
3. \u8fdb\u884c\u5168\u6587\u641c\u7d22<\/h1>\n
\u63d0\u53d6\u4ef7\u683c\u4e3a1000\u7684\u6570\u636e\u3002<\/p>\n
MariaDB [testdata]> explain select id,name,price from item where price = 1000;\r\n+------+-------------+-------+------+---------------+------+---------+------+---------+-------------+\r\n| id   | select_type | table | type | possible_keys | key  | key_len | ref  | rows    | Extra       |\r\n+------+-------------+-------+------+---------------+------+---------+------+---------+-------------+\r\n|    1 | SIMPLE      | item  | ALL  | NULL          | NULL | NULL    | NULL | 3861004 | Using where |\r\n+------+-------------+-------+------+---------------+------+---------+------+---------+-------------+\r\n1 row in set (0.01 sec)\r\n\r\nMariaDB [testdata]>\r\n<\/code><\/pre>\n
\u4ece\u8bb2\u89e3\u7684\u7ed3\u679c\u6765\u770b\uff0c\u53ef\u4ee5\u786e\u8ba4\u8fd9\u662f\u4e00\u4e2a\u6ca1\u6709\u5229\u7528\u7d22\u5f15\u7684\u67e5\u8be2\u3002<\/p>\n
MariaDB [testdata]> select id,name,price from item where price = 1000;\r\n+---------+---------------+-------+\r\n| id      | name          | price |\r\n+---------+---------------+-------+\r\n|    5642 | \u5546\u54c15642      |  1000 |\r\n|   17140 | \u5546\u54c117140     |  1000 |\r\n~ \u7701\u7565 ~\r\n| 4584289 | \u5546\u54c14584289   |  1000 |\r\n| 4587464 | \u5546\u54c14587464   |  1000 |\r\n+---------+---------------+-------+\r\n448 rows in set (11.90 sec)\r\n\r\nMariaDB [testdata]>\r\n<\/code><\/pre>\n
\u7ed3\u679c\u572811.90\u79d2\u5185\u8fd4\u56de\u4e86\u3002 11.90 le.)<\/p>\n
4. \u5148\u6839\u636eid\u7b5b\u9009\u51fa10\u4e07\u6761\u6570\u636e\uff0c\u7136\u540e\u8fdb\u884c\u641c\u7d22\u3002<\/h1>\n
\u4e0e3\u76f8\u4f3c\uff0c\u63d0\u53d6price\u4e3a1000\u7684\u6570\u636e\u3002<\/p>\n
MariaDB [testdata]> explain select id,name,price from ( select id,name,price from item order by id desc limit 100000 ) as IDDESHIBORU where price = 1000;\r\n+------+-------------+------------+-------+---------------+---------+---------+------+--------+-------------+\r\n| id   | select_type | table      | type  | possible_keys | key     | key_len | ref  | rows   | Extra       |\r\n+------+-------------+------------+-------+---------------+---------+---------+------+--------+-------------+\r\n|    1 | PRIMARY     | <derived2> | ALL   | NULL          | NULL    | NULL    | NULL | 100000 | Using where |\r\n|    2 | DERIVED     | item       | index | NULL          | PRIMARY | 4       | NULL | 100000 |             |\r\n+------+-------------+------------+-------+---------------+---------+---------+------+--------+-------------+\r\n2 rows in set (0.00 sec)\r\n\r\nMariaDB [testdata]>\r\n<\/code><\/pre>\n
\u53ef\u4ee5\u786e\u8ba4\u884c\u6570\u5df2\u7ecf\u8fbe\u5230\u4e8610\u4e07\u884c\u3002<\/p>\n
MariaDB [testdata]> select id,name,price from ( select id,name,price from item order by id desc limit 100000 ) as IDDESHIBORU where price = 1000;\r\n+---------+---------------+-------+\r\n| id      | name          | price |\r\n+---------+---------------+-------+\r\n| 4587464 | \u5546\u54c14587464   |  1000 |\r\n| 4584289 | \u5546\u54c14584289   |  1000 |\r\n| 4582423 | \u5546\u54c14582423   |  1000 |\r\n| 4574711 | \u5546\u54c14574711   |  1000 |\r\n| 4573402 | \u5546\u54c14573402   |  1000 |\r\n| 4569544 | \u5546\u54c14569544   |  1000 |\r\n| 4568591 | \u5546\u54c14568591   |  1000 |\r\n| 4564896 | \u5546\u54c14564896   |  1000 |\r\n| 4541937 | \u5546\u54c14541937   |  1000 |\r\n| 4541451 | \u5546\u54c14541451   |  1000 |\r\n| 4540470 | \u5546\u54c14540470   |  1000 |\r\n| 4531149 | \u5546\u54c14531149   |  1000 |\r\n| 4530580 | \u5546\u54c14530580   |  1000 |\r\n| 4513801 | \u5546\u54c14513801   |  1000 |\r\n| 4512960 | \u5546\u54c14512960   |  1000 |\r\n| 4499883 | \u5546\u54c14499883   |  1000 |\r\n+---------+---------------+-------+\r\n16 rows in set (0.12 sec)\r\n\r\nMariaDB [testdata]>\r\n<\/code><\/pre>\n
0.12\u79d2\u5185\u5f97\u5230\u4e86\u7ed3\u679c\u3002<\/p>\n
5. \u6982\u62ec<\/h1>\n
\u5f53\u6570\u636e\u5e93\u7684\u6570\u636e\u53d8\u5f97\u76f8\u5f53\u5e9e\u5927\u65f6\uff0c\u67e5\u8be2\u7684\u6267\u884c\u65f6\u95f4\u5c31\u4f1a\u53d8\u957f\u3002
\n\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u901a\u8fc7\u4f7f\u7528\u5b50\u67e5\u8be2\u6765\u7f29\u5c0f\u6570\u636e\u8303\u56f4\u518d\u8fdb\u884c\u6267\u884c\u53ef\u4ee5\u52a0\u5feb\u901f\u5ea6\u3002
\n\u6b64\u5916\uff0c\u867d\u7136\u73b0\u5728\u6ca1\u6709\u4f7f\u7528\uff0c\u4f46\u6211\u8ba4\u4e3a\u6700\u597d\u80fd\u591f\u5c3d\u91cf\u4f7f\u7d22\u5f15\u5bf9\u67e5\u8be2\u6761\u4ef6\u8d77\u5230\u4f5c\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e3a\u4ec0\u4e48\u4f60\u60f3\u8981\u505a\u90a3\u6837\u7684\u4e8b\u60c5\u5462\uff1f \u67e5\u8be2\u8fd9\u4e2a\u5927\u7ea6\u6709120\u4e07\u884c\u7684\u8868\u65f6\uff0c\u82b1\u4e86\u5927\u7ea630\u5206\u949f\u7684\u65f6\u95f4\u3002 \u5728\u6307\u5b9a\u7684\u641c\u7d22\u6761\u4ef6\u5217\u4e0a\u6ca1 […]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-28802","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"\n\u5728\u6267\u884c\u67e5\u8be2\u4e4b\u524d\u8fdb\u884c\u6570\u636e\u7b5b\u9009 (MySQL) - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u5728\u6267\u884c\u67e5\u8be2\u4e4b\u524d\u8fdb\u884c\u6570\u636e\u7b5b\u9009 (MySQL)\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5728\u6267\u884c\u67e5\u8be2\u4e4b\u524d\u8fdb\u884c\u6570\u636e\u7b5b\u9009-mysql\u3002\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5728\u6267\u884c\u67e5\u8be2\u4e4b\u524d\u8fdb\u884c\u6570\u636e\u7b5b\u9009 (MySQL)\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u5728\u6267\u884c\u67e5\u8be2\u4e4b\u524d\u8fdb\u884c\u6570\u636e\u7b5b\u9009 (MySQL)\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5728\u6267\u884c\u67e5\u8be2\u4e4b\u524d\u8fdb\u884c\u6570\u636e\u7b5b\u9009-mysql\u3002\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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