{"id":79778,"date":"2024-10-16T13:33:45","date_gmt":"2024-10-16T05:33:45","guid":{"rendered":"https:\/\/server.hk\/cnblog\/79778\/"},"modified":"2024-10-16T13:33:45","modified_gmt":"2024-10-16T05:33:45","slug":"mysql%e6%8c%87%e4%bb%a4-smallint%ef%bc%88%e5%b0%8f%e6%95%b4%e6%95%b8%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/79778\/","title":{"rendered":"MySQL\u6307\u4ee4: SMALLINT\uff08\u5c0f\u6574\u6578\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-smallint%ef%bc%88%e5%b0%8f%e6%95%b4%e6%95%b8%ef%bc%89-SOLqbbxmyI\">MySQL\u6307\u4ee4: SMALLINT\uff08\u5c0f\u6574\u6578\uff09<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u6578\u64da\u985e\u578b\u7684\u9078\u64c7\u5c0d\u65bc\u6578\u64da\u7684\u5b58\u5132\u548c\u8655\u7406\u6548\u7387\u81f3\u95dc\u91cd\u8981\u3002MySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u8cc7\u6599\u5eab\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u985e\u578b\u4ee5\u6eff\u8db3\u4e0d\u540c\u7684\u9700\u6c42\u3002\u5176\u4e2d\uff0c<code>SMALLINT<\/code>\u662f\u4e00\u7a2e\u7528\u65bc\u5b58\u5132\u5c0f\u6574\u6578\u7684\u6578\u64da\u985e\u578b\uff0c\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5176\u7279\u6027\u3001\u4f7f\u7528\u5834\u666f\u53ca\u76f8\u95dc\u7bc4\u4f8b\u3002<\/p>\n<h2 id=\"smallint%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%89%b9%e6%80%a7-SOLqbbxmyI\">SMALLINT\u7684\u57fa\u672c\u7279\u6027<\/h2>\n<p><code>SMALLINT<\/code>\u662f\u4e00\u7a2e\u6574\u6578\u6578\u64da\u985e\u578b\uff0c\u901a\u5e38\u7528\u65bc\u9700\u8981\u5b58\u5132\u7bc4\u570d\u8f03\u5c0f\u7684\u6574\u6578\u503c\u7684\u60c5\u6cc1\u3002\u6839\u64daMySQL\u7684\u5b9a\u7fa9\uff0c<code>SMALLINT<\/code>\u7684\u5b58\u5132\u7bc4\u570d\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u6709\u7b26\u865f\uff08signed\uff09\uff1a-32,768 \u5230 32,767<\/li>\n<li>\u7121\u7b26\u865f\uff08unsigned\uff09\uff1a0 \u5230 65,535<\/li>\n<\/ul>\n<p>\u9019\u610f\u5473\u8457\uff0c<code>SMALLINT<\/code>\u4f54\u7528\u7684\u5b58\u5132\u7a7a\u9593\u70ba2\u500b\u5b57\u7bc0\uff0c\u9019\u4f7f\u5f97\u5b83\u5728\u5b58\u5132\u5c0f\u7bc4\u570d\u6574\u6578\u6642\u975e\u5e38\u9ad8\u6548\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e5%a0%b4%e6%99%af-SOLqbbxmyI\">\u4f7f\u7528\u5834\u666f<\/h2>\n<p>\u7531\u65bc<code>SMALLINT<\/code>\u7684\u5b58\u5132\u7bc4\u570d\u6709\u9650\uff0c\u5b83\u9069\u5408\u7528\u65bc\u4ee5\u4e0b\u5e7e\u7a2e\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li>\u9700\u8981\u5b58\u5132\u5c0f\u7bc4\u570d\u7684\u6578\u5b57\uff0c\u4f8b\u5982\u5e74\u9f61\u3001\u6578\u91cf\u7b49\u3002<\/li>\n<li>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528<code>SMALLINT<\/code>\u53ef\u4ee5\u7bc0\u7701\u5b58\u5132\u7a7a\u9593\uff0c\u7279\u5225\u662f\u5728\u5927\u578b\u6578\u64da\u5eab\u4e2d\u3002<\/li>\n<li>\u7576\u6578\u64da\u7684\u7bc4\u570d\u5df2\u77e5\u4e14\u4e0d\u6703\u8d85\u904e<code>SMALLINT<\/code>\u7684\u9650\u5236\u6642\uff0c\u4f7f\u7528\u6b64\u6578\u64da\u985e\u578b\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8smallint-SOLqbbxmyI\">\u5982\u4f55\u4f7f\u7528SMALLINT<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u5b9a\u7fa9<code>SMALLINT<\/code>\u985e\u578b\u7684\u8a9e\u6cd5\u975e\u5e38\u7c21\u55ae\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u5275\u5efa\u8868\u7684\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE users (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    age SMALLINT,\n    score SMALLINT UNSIGNED\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba<code>users<\/code>\u7684\u8868\uff0c\u5176\u4e2d\u5305\u542b\u4e09\u500b\u6b04\u4f4d\uff1a<code>id<\/code>\u3001<code>age<\/code>\u548c<code>score<\/code>\u3002\u5176\u4e2d\uff0c<code>age<\/code>\u4f7f\u7528\u4e86\u6709\u7b26\u865f\u7684<code>SMALLINT<\/code>\uff0c\u800c<code>score<\/code>\u5247\u4f7f\u7528\u4e86\u7121\u7b26\u865f\u7684<code>SMALLINT<\/code>\u3002<\/p>\n<h2 id=\"%e6%8f%92%e5%85%a5%e5%92%8c%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a-SOLqbbxmyI\">\u63d2\u5165\u548c\u67e5\u8a62\u6578\u64da<\/h2>\n<p>\u63d2\u5165\u6578\u64da\u5230<code>SMALLINT<\/code>\u6b04\u4f4d\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>INSERT INTO users (age, score) VALUES (25, 100);<\/code><\/pre>\n<p>\u67e5\u8a62\u6578\u64da\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528\u6a19\u6e96\u7684<code>SELECT<\/code>\u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE age &gt; 20;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u6240\u6709\u5e74\u9f61\u5927\u65bc20\u7684\u7528\u6236\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-SOLqbbxmyI\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528<code>SMALLINT<\/code>\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u6578\u64da\u4e0d\u6703\u8d85\u904e<code>SMALLINT<\/code>\u7684\u7bc4\u570d\uff0c\u5426\u5247\u5c07\u5c0e\u81f4\u6578\u64da\u6ea2\u51fa\u3002<\/li>\n<li>\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\uff0c\u5408\u7406\u9078\u64c7\u6578\u64da\u985e\u578b\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\u548c\u5b58\u5132\u6548\u7387\u3002<\/li>\n<li>\u5728\u9032\u884c\u6578\u64da\u9077\u79fb\u6216\u5347\u7d1a\u6642\uff0c\u9700\u6aa2\u67e5\u6578\u64da\u985e\u578b\u7684\u517c\u5bb9\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-SOLqbbxmyI\">\u7e3d\u7d50<\/h2>\n<p>\u7e3d\u7684\u4f86\u8aaa\uff0c<code>SMALLINT<\/code>\u662f\u4e00\u500b\u9ad8\u6548\u7684\u6578\u64da\u985e\u578b\uff0c\u9069\u5408\u7528\u65bc\u5b58\u5132\u5c0f\u7bc4\u570d\u7684\u6574\u6578\u3002\u901a\u904e\u5408\u7406\u7684\u4f7f\u7528<code>SMALLINT<\/code>\uff0c\u53ef\u4ee5\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u9054\u5230\u66f4\u597d\u7684\u6027\u80fd\u548c\u5b58\u5132\u6548\u7387\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u89e3\u6c7a\u65b9\u6848\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\u4ee5\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u4e2d\u7684SMALLINT\u6570\u636e\u7c7b\u578b\uff0c\u9002\u7528\u4e8e\u5b58\u50a8\u5c0f\u8303\u56f4\u6574\u6570\uff0c\u8282\u7701\u5b58\u50a8\u7a7a\u95f4\uff0c\u63d0\u5347\u6570\u636e\u5e93\u6027\u80fd\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-79778","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79778","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=79778"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79778\/revisions"}],"predecessor-version":[{"id":79779,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79778\/revisions\/79779"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=79778"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=79778"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=79778"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}