{"id":77702,"date":"2024-10-16T11:04:18","date_gmt":"2024-10-16T03:04:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/77702\/"},"modified":"2024-10-16T11:04:18","modified_gmt":"2024-10-16T03:04:18","slug":"mysql%e6%8c%87%e4%bb%a4-auto_increment%ef%bc%88%e8%87%aa%e5%a2%9e%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/77702\/","title":{"rendered":"MySQL\u6307\u4ee4: AUTO_INCREMENT\uff08\u81ea\u589e\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-auto_increment%ef%bc%88%e8%87%aa%e5%a2%9e%ef%bc%89-OdFZBtqUvy\">MySQL\u6307\u4ee4: AUTO_INCREMENT\uff08\u81ea\u589e\uff09<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u958b\u6e90\u8cc7\u6599\u5eab\uff0c\u7279\u5225\u662f\u5728Web\u61c9\u7528\u7a0b\u5f0f\u4e2d\u3002\u7576\u6211\u5011\u8a2d\u8a08\u8cc7\u6599\u8868\u6642\uff0c\u7d93\u5e38\u9700\u8981\u4e00\u500b\u552f\u4e00\u7684\u8b58\u5225\u78bc\u4f86\u6a19\u8b58\u6bcf\u4e00\u689d\u8a18\u9304\u3002\u9019\u6642\uff0cAUTO_INCREMENT\uff08\u81ea\u589e\uff09\u5c6c\u6027\u4fbf\u6210\u70ba\u4e86\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u529f\u80fd\u3002<\/p>\n<h2 id=\"auto_increment%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-OdFZBtqUvy\">AUTO_INCREMENT\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>AUTO_INCREMENT\u662f\u4e00\u500bMySQL\u7684\u5c6c\u6027\uff0c\u901a\u5e38\u7528\u65bc\u6574\u6578\u578b\u7684\u6b04\u4f4d\u3002\u7576\u4e00\u689d\u65b0\u8a18\u9304\u88ab\u63d2\u5165\u5230\u8cc7\u6599\u8868\u4e2d\u6642\uff0c\u9019\u500b\u6b04\u4f4d\u7684\u503c\u6703\u81ea\u52d5\u589e\u52a0\uff0c\u5f9e\u800c\u4fdd\u8b49\u6bcf\u4e00\u689d\u8a18\u9304\u90fd\u6709\u4e00\u500b\u552f\u4e00\u7684\u8b58\u5225\u78bc\u3002\u9019\u5c0d\u65bc\u4e3b\u9375\uff08PRIMARY KEY\uff09\u7279\u5225\u91cd\u8981\uff0c\u56e0\u70ba\u4e3b\u9375\u5fc5\u9808\u662f\u552f\u4e00\u7684\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8auto_increment-OdFZBtqUvy\">\u5982\u4f55\u4f7f\u7528AUTO_INCREMENT<\/h2>\n<p>\u8981\u4f7f\u7528AUTO_INCREMENT\uff0c\u9996\u5148\u9700\u8981\u5728\u5275\u5efa\u8cc7\u6599\u8868\u6642\u6307\u5b9a\u8a72\u5c6c\u6027\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE users (\n    id INT AUTO_INCREMENT,\n    username VARCHAR(50) NOT NULL,\n    email VARCHAR(100) NOT NULL,\n    PRIMARY KEY (id)\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70bausers\u7684\u8cc7\u6599\u8868\uff0c\u5176\u4e2did\u6b04\u4f4d\u88ab\u8a2d\u7f6e\u70baAUTO_INCREMENT\u3002\u9019\u610f\u5473\u8457\u6bcf\u7576\u6211\u5011\u63d2\u5165\u4e00\u689d\u65b0\u8a18\u9304\u6642\uff0cid\u7684\u503c\u6703\u81ea\u52d5\u589e\u52a0\u3002<\/p>\n<h2 id=\"%e6%8f%92%e5%85%a5%e6%95%b8%e6%93%9a%e7%a4%ba%e4%be%8b-OdFZBtqUvy\">\u63d2\u5165\u6578\u64da\u793a\u4f8b<\/h2>\n<p>\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u53ef\u4ee5\u63d2\u5165\u4e00\u4e9b\u6578\u64da\u4f86\u89c0\u5bdfAUTO_INCREMENT\u7684\u6548\u679c\uff1a<\/p>\n<pre><code>INSERT INTO users (username, email) VALUES ('Alice', 'alice@example.com');\nINSERT INTO users (username, email) VALUES ('Bob', 'bob@example.com');<\/code><\/pre>\n<p>\u57f7\u884c\u4ee5\u4e0a\u63d2\u5165\u8a9e\u53e5\u5f8c\uff0c\u8cc7\u6599\u8868\u4e2d\u7684\u6578\u64da\u5c07\u6703\u662f\uff1a<\/p>\n<pre><code>+----+----------+-------------------+\n| id | username | email             |\n+----+----------+-------------------+\n|  1 | Alice    | alice@example.com  |\n|  2 | Bob      | bob@example.com    |\n+----+----------+-------------------+<\/code><\/pre>\n<h2 id=\"auto_increment%e7%9a%84%e7%89%b9%e6%80%a7-OdFZBtqUvy\">AUTO_INCREMENT\u7684\u7279\u6027<\/h2>\n<ul>\n<li><strong>\u81ea\u52d5\u589e\u9577\uff1a<\/strong>\u6bcf\u6b21\u63d2\u5165\u65b0\u8a18\u9304\u6642\uff0cAUTO_INCREMENT\u6b04\u4f4d\u7684\u503c\u6703\u81ea\u52d5\u589e\u52a0\u3002<\/li>\n<li><strong>\u552f\u4e00\u6027\uff1a<\/strong>AUTO_INCREMENT\u6b04\u4f4d\u901a\u5e38\u7528\u4f5c\u4e3b\u9375\uff0c\u78ba\u4fdd\u6bcf\u689d\u8a18\u9304\u7684\u552f\u4e00\u6027\u3002<\/li>\n<li><strong>\u53ef\u91cd\u7f6e\uff1a<\/strong>\u53ef\u4ee5\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u91cd\u7f6eAUTO_INCREMENT\u7684\u8d77\u59cb\u503c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e9%87%8d%e7%bd%aeauto_increment%e7%9a%84%e5%80%bc-OdFZBtqUvy\">\u91cd\u7f6eAUTO_INCREMENT\u7684\u503c<\/h2>\n<p>\u5982\u679c\u9700\u8981\u91cd\u7f6eAUTO_INCREMENT\u7684\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>ALTER TABLE users AUTO_INCREMENT = 1;<\/code><\/pre>\n<p>\u9019\u5c07\u4f7f\u4e0b\u4e00\u6b21\u63d2\u5165\u7684\u8a18\u9304id\u5f9e1\u958b\u59cb\uff0c\u4f46\u8acb\u6ce8\u610f\uff0c\u5982\u679c\u8cc7\u6599\u8868\u4e2d\u5df2\u7d93\u5b58\u5728\u8a18\u9304\uff0c\u9019\u53ef\u80fd\u6703\u5c0e\u81f4\u4e3b\u9375\u885d\u7a81\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-OdFZBtqUvy\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528AUTO_INCREMENT\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u5982\u679c\u522a\u9664\u4e86\u4e00\u689d\u8a18\u9304\uff0c\u8a72\u8a18\u9304\u7684AUTO_INCREMENT\u503c\u4e0d\u6703\u88ab\u91cd\u7528\u3002<\/li>\n<li>\u5728\u591a\u7528\u6236\u74b0\u5883\u4e2d\uff0cAUTO_INCREMENT\u7684\u884c\u70ba\u662f\u5b89\u5168\u7684\uff0cMySQL\u6703\u81ea\u52d5\u8655\u7406\u4e26\u767c\u554f\u984c\u3002<\/li>\n<li>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u8003\u616e\u4f7f\u7528UUID\u4f5c\u70ba\u4e3b\u9375\uff0c\u4ee5\u907f\u514dAUTO_INCREMENT\u7684\u9650\u5236\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-OdFZBtqUvy\">\u7e3d\u7d50<\/h2>\n<p>AUTO_INCREMENT\u662f\u4e00\u500b\u5f37\u5927\u7684\u529f\u80fd\uff0c\u80fd\u5920\u7c21\u5316\u8cc7\u6599\u5eab\u4e2d\u552f\u4e00\u8b58\u5225\u78bc\u7684\u7ba1\u7406\u3002\u7121\u8ad6\u662f\u5728\u958b\u767c\u5c0f\u578b\u61c9\u7528\u9084\u662f\u5927\u578b\u7cfb\u7d71\u4e2d\uff0c\u6b63\u78ba\u4f7f\u7528AUTO_INCREMENT\u90fd\u80fd\u63d0\u9ad8\u8cc7\u6599\u5eab\u7684\u6548\u7387\u548c\u53ef\u7ba1\u7406\u6027\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u8cc7\u6599\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u90e8\u7f72\u60a8\u7684MySQL\u8cc7\u6599\u5eab\uff0c\u4eab\u53d7\u66f4\u9ad8\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u4e2d\u7684AUTO_INCREMENT\u6307\u4ee4\uff0c\u81ea\u52a8\u4e3a\u65b0\u8bb0\u5f55\u751f\u6210\u552f\u4e00ID\uff0c\u7b80\u5316\u6570\u636e\u7ba1\u7406\u4e0e\u63d2\u5165\u64cd\u4f5c\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-77702","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/77702","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=77702"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/77702\/revisions"}],"predecessor-version":[{"id":77703,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/77702\/revisions\/77703"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=77702"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=77702"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=77702"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}