{"id":76752,"date":"2024-10-16T09:33:17","date_gmt":"2024-10-16T01:33:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76752\/"},"modified":"2024-10-16T09:33:18","modified_gmt":"2024-10-16T01:33:18","slug":"mysql%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e4%b9%8b%e6%95%b8%e5%ad%97%e9%a1%9e%e5%9e%8b%e8%a9%b3%e7%b4%b0%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76752\/","title":{"rendered":"MySQL\u6578\u64da\u985e\u578b\u4e4b\u6578\u5b57\u985e\u578b\u8a73\u7d30\u89e3\u6790"},"content":{"rendered":"<h1 id=\"mysql%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e4%b9%8b%e6%95%b8%e5%ad%97%e9%a1%9e%e5%9e%8b%e8%a9%b3%e7%b4%b0%e8%a7%a3%e6%9e%90-LLDAyTciqt\">MySQL\u6578\u64da\u985e\u578b\u4e4b\u6578\u5b57\u985e\u578b\u8a73\u7d30\u89e3\u6790<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u5c0d\u65bc\u6578\u64da\u7684\u5b58\u5132\u548c\u8655\u7406\u81f3\u95dc\u91cd\u8981\u3002MySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u985e\u578b\u4ee5\u6eff\u8db3\u4e0d\u540c\u7684\u9700\u6c42\u3002\u672c\u6587\u5c07\u91cd\u9ede\u89e3\u6790MySQL\u4e2d\u7684\u6578\u5b57\u985e\u578b\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5176\u7279\u6027\u53ca\u4f7f\u7528\u5834\u666f\u3002<\/p>\n<h2 id=\"mysql%e6%95%b8%e5%ad%97%e9%a1%9e%e5%9e%8b%e6%a6%82%e8%bf%b0-LLDAyTciqt\">MySQL\u6578\u5b57\u985e\u578b\u6982\u8ff0<\/h2>\n<p>MySQL\u4e2d\u7684\u6578\u5b57\u985e\u578b\u4e3b\u8981\u5206\u70ba\u6574\u6578\u985e\u578b\u548c\u6d6e\u9ede\u6578\u985e\u578b\u3002\u6574\u6578\u985e\u578b\u7528\u65bc\u5b58\u5132\u6574\u6578\uff0c\u800c\u6d6e\u9ede\u6578\u985e\u578b\u5247\u7528\u65bc\u5b58\u5132\u5e36\u5c0f\u6578\u7684\u6578\u5b57\u3002\u9019\u4e9b\u6578\u64da\u985e\u578b\u7684\u9078\u64c7\u6703\u5f71\u97ff\u6578\u64da\u7684\u5b58\u5132\u6548\u7387\u548c\u8a08\u7b97\u7cbe\u5ea6\u3002<\/p>\n<h3 id=\"%e6%95%b4%e6%95%b8%e9%a1%9e%e5%9e%8b-LLDAyTciqt\">\u6574\u6578\u985e\u578b<\/h3>\n<p>\u6574\u6578\u985e\u578b\u5728MySQL\u4e2d\u6709\u591a\u7a2e\u5f62\u5f0f\uff0c\u4e3b\u8981\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>TINYINT<\/code>: \u7bc4\u570d\u70ba -128 \u5230 127\uff08\u6709\u7b26\u865f\uff09\u6216 0 \u5230 255\uff08\u7121\u7b26\u865f\uff09\uff0c\u4f54\u75281\u500b\u5b57\u7bc0\u3002<\/li>\n<li><code>SMALLINT<\/code>: \u7bc4\u570d\u70ba -32,768 \u5230 32,767\uff08\u6709\u7b26\u865f\uff09\u6216 0 \u5230 65,535\uff08\u7121\u7b26\u865f\uff09\uff0c\u4f54\u75282\u500b\u5b57\u7bc0\u3002<\/li>\n<li><code>MEDIUMINT<\/code>: \u7bc4\u570d\u70ba -8,388,608 \u5230 8,388,607\uff08\u6709\u7b26\u865f\uff09\u6216 0 \u5230 16,777,215\uff08\u7121\u7b26\u865f\uff09\uff0c\u4f54\u75283\u500b\u5b57\u7bc0\u3002<\/li>\n<li><code>INT<\/code>: \u7bc4\u570d\u70ba -2,147,483,648 \u5230 2,147,483,647\uff08\u6709\u7b26\u865f\uff09\u6216 0 \u5230 4,294,967,295\uff08\u7121\u7b26\u865f\uff09\uff0c\u4f54\u75284\u500b\u5b57\u7bc0\u3002<\/li>\n<li><code>BIGINT<\/code>: \u7bc4\u570d\u70ba -9,223,372,036,854,775,808 \u5230 9,223,372,036,854,775,807\uff08\u6709\u7b26\u865f\uff09\u6216 0 \u5230 18,446,744,073,709,551,615\uff08\u7121\u7b26\u865f\uff09\uff0c\u4f54\u75288\u500b\u5b57\u7bc0\u3002<\/li>\n<\/ul>\n<p>\u9078\u64c7\u6574\u6578\u985e\u578b\u6642\uff0c\u61c9\u6839\u64da\u9810\u671f\u7684\u6578\u64da\u7bc4\u570d\u4f86\u9078\u64c7\u5408\u9069\u7684\u985e\u578b\uff0c\u4ee5\u7bc0\u7701\u5b58\u5132\u7a7a\u9593\u3002\u4f8b\u5982\uff0c\u5982\u679c\u53ea\u9700\u5b58\u51320\u5230100\u4e4b\u9593\u7684\u6578\u5b57\uff0c\u5247\u4f7f\u7528<code>TINYINT<\/code>\u662f\u5408\u9069\u7684\u9078\u64c7\u3002<\/p>\n<h3 id=\"%e6%b5%ae%e9%bb%9e%e6%95%b8%e9%a1%9e%e5%9e%8b-LLDAyTciqt\">\u6d6e\u9ede\u6578\u985e\u578b<\/h3>\n<p>\u6d6e\u9ede\u6578\u985e\u578b\u4e3b\u8981\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>FLOAT<\/code>: \u7528\u65bc\u5b58\u5132\u55ae\u7cbe\u5ea6\u6d6e\u9ede\u6578\uff0c\u4f54\u75284\u500b\u5b57\u7bc0\uff0c\u7cbe\u5ea6\u7d04\u70ba7\u4f4d\u5341\u9032\u5236\u6578\u3002<\/li>\n<li><code>DOUBLE<\/code>: \u7528\u65bc\u5b58\u5132\u96d9\u7cbe\u5ea6\u6d6e\u9ede\u6578\uff0c\u4f54\u75288\u500b\u5b57\u7bc0\uff0c\u7cbe\u5ea6\u7d04\u70ba15\u4f4d\u5341\u9032\u5236\u6578\u3002<\/li>\n<li><code>DECIMAL(M, D)<\/code>: \u7528\u65bc\u5b58\u5132\u7cbe\u78ba\u7684\u6578\u5b57\uff0cM\u8868\u793a\u7e3d\u4f4d\u6578\uff0cD\u8868\u793a\u5c0f\u6578\u4f4d\u6578\uff0c\u4f54\u7528\u7684\u5b57\u7bc0\u6578\u6839\u64daM\u7684\u5927\u5c0f\u800c\u8b8a\u5316\u3002<\/li>\n<\/ul>\n<p>\u6d6e\u9ede\u6578\u985e\u578b\u9069\u5408\u7528\u65bc\u9700\u8981\u5c0f\u6578\u7684\u8a08\u7b97\uff0c\u5982\u50f9\u683c\u6216\u79d1\u5b78\u8a08\u7b97\u3002<code>DECIMAL<\/code>\u985e\u578b\u7279\u5225\u9069\u5408\u91d1\u878d\u61c9\u7528\uff0c\u56e0\u70ba\u5b83\u80fd\u5920\u63d0\u4f9b\u7cbe\u78ba\u7684\u8a08\u7b97\u7d50\u679c\uff0c\u907f\u514d\u6d6e\u9ede\u6578\u904b\u7b97\u4e2d\u7684\u8aa4\u5dee\u3002<\/p>\n<h2 id=\"%e6%95%b8%e5%ad%97%e9%a1%9e%e5%9e%8b%e7%9a%84%e9%81%b8%e6%93%87%e5%bb%ba%e8%ad%b0-LLDAyTciqt\">\u6578\u5b57\u985e\u578b\u7684\u9078\u64c7\u5efa\u8b70<\/h2>\n<p>\u5728\u9078\u64c7\u6578\u5b57\u985e\u578b\u6642\uff0c\u61c9\u8003\u616e\u4ee5\u4e0b\u5e7e\u500b\u56e0\u7d20\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u7bc4\u570d<\/strong>: \u6839\u64da\u9810\u671f\u7684\u6578\u64da\u7bc4\u570d\u9078\u64c7\u5408\u9069\u7684\u6574\u6578\u6216\u6d6e\u9ede\u6578\u985e\u578b\u3002<\/li>\n<li><strong>\u5b58\u5132\u6548\u7387<\/strong>: \u4f7f\u7528\u6700\u5c0f\u7684\u6578\u64da\u985e\u578b\u4ee5\u7bc0\u7701\u5b58\u5132\u7a7a\u9593\u3002<\/li>\n<li><strong>\u8a08\u7b97\u7cbe\u5ea6<\/strong>: \u5c0d\u65bc\u9700\u8981\u9ad8\u7cbe\u5ea6\u7684\u8a08\u7b97\uff0c\u9078\u64c7<code>DECIMAL<\/code>\u985e\u578b\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u5728\u8a2d\u8a08\u4e00\u500b\u7528\u65bc\u8a18\u9304\u7528\u6236\u5e74\u9f61\u7684\u6578\u64da\u8868\u6642\uff0c\u4f7f\u7528<code>TINYINT<\/code>\u662f\u5408\u9069\u7684\u9078\u64c7\uff0c\u56e0\u70ba\u5e74\u9f61\u7684\u7bc4\u570d\u901a\u5e38\u57280\u5230120\u4e4b\u9593\u3002\u800c\u5728\u8655\u7406\u91d1\u9322\u6642\uff0c\u5247\u61c9\u4f7f\u7528<code>DECIMAL<\/code>\u985e\u578b\u4ee5\u78ba\u4fdd\u8a08\u7b97\u7684\u6e96\u78ba\u6027\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-LLDAyTciqt\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u5b57\u985e\u578b\u4ee5\u6eff\u8db3\u4e0d\u540c\u7684\u9700\u6c42\uff0c\u5f9e\u6574\u6578\u5230\u6d6e\u9ede\u6578\uff0c\u6bcf\u7a2e\u6578\u64da\u985e\u578b\u90fd\u6709\u5176\u7279\u5b9a\u7684\u7528\u9014\u548c\u512a\u52e2\u3002\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u4e0d\u50c5\u80fd\u63d0\u9ad8\u6578\u64da\u5b58\u5132\u7684\u6548\u7387\uff0c\u9084\u80fd\u78ba\u4fdd\u8a08\u7b97\u7684\u6e96\u78ba\u6027\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u80fd\u548c\u7a69\u5b9a\u6027\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u89e3\u6790MySQL\u6578\u64da\u985e\u578b\u4e2d\u7684\u6578\u5b57\u985e\u578b\uff0c\u4e86\u89e3\u5404\u985e\u578b\u7684\u7279\u9ede\u3001\u4f7f\u7528\u5834\u666f\u53ca\u6700\u4f73\u5be6\u8e10\uff0c\u52a9\u4f60\u512a\u5316\u6578\u64da\u5eab\u8a2d\u8a08\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-76752","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76752","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=76752"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76752\/revisions"}],"predecessor-version":[{"id":76753,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76752\/revisions\/76753"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76752"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76752"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76752"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}