{"id":5438,"date":"2024-11-14T09:53:22","date_gmt":"2024-11-14T01:53:22","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5438\/"},"modified":"2024-11-14T09:53:22","modified_gmt":"2024-11-14T01:53:22","slug":"mysql%e6%95%b0%e5%ad%97%e7%b1%bb%e5%9e%8b%e6%80%8e%e4%b9%88%e8%a1%a8%e7%a4%ba","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5438\/","title":{"rendered":"mysql\u6570\u5b57\u7c7b\u578b\u600e\u4e48\u8868\u793a"},"content":{"rendered":"<blockquote><p>\n  mysql \u63d0\u4f9b\u4e86\u591a\u79cd\u6570\u5b57\u7c7b\u578b\uff0c\u5305\u62ec\u6574\u6570\uff08tinyint\u3001smallint\u3001mediumint\u3001int\u3001bigint\uff09\u548c\u6d6e\u70b9\u7c7b\u578b\uff08float\u3001real\u3001double\uff09\u3002\u9009\u62e9\u6570\u5b57\u7c7b\u578b\u65f6\uff0c\u8bf7\u8003\u8651\u6570\u5b57\u8303\u56f4\u3001\u7cbe\u5ea6\u3001\u5b58\u50a8\u9700\u6c42\u548c\u6027\u80fd\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202405\/28\/2024052813153518565.jpg\" class=\"aligncenter\" title=\"mysql\u6570\u5b57\u7c7b\u578b\u600e\u4e48\u8868\u793a\u63d2\u56fe\" alt=\"mysql\u6570\u5b57\u7c7b\u578b\u600e\u4e48\u8868\u793a\u63d2\u56fe\" \/><\/p>\n<p><strong>MySQL \u6570\u5b57\u7c7b\u578b\u8868\u793a<\/strong><\/p>\n<p>MySQL \u63d0\u4f9b\u4e86\u591a\u79cd\u6570\u5b57\u7c7b\u578b\u6765\u8868\u793a\u4e0d\u540c\u7684\u6570\u5b57\u8303\u56f4\u548c\u7cbe\u5ea6\u8981\u6c42\u3002\u8fd9\u4e9b\u7c7b\u578b\u5305\u62ec\uff1a<\/p>\n<p><strong>\u6574\u6570\u7c7b\u578b\uff1a<\/strong><\/p>\n<ul>\n<li> <strong>TINYINT<\/strong>\uff1a\u8303\u56f4\u4e3a -128 \u81f3 127 \u7684 8 \u4f4d\u6709\u7b26\u53f7\u6574\u6570<\/li>\n<li> <strong>SMALLINT<\/strong>\uff1a\u8303\u56f4\u4e3a -32,768 \u81f3 32,767 \u7684 16 \u4f4d\u6709\u7b26\u53f7\u6574\u6570<\/li>\n<li> <strong>MEDIUMINT<\/strong>\uff1a\u8303\u56f4\u4e3a -8,388,608 \u81f3 8,388,607 \u7684 24 \u4f4d\u6709\u7b26\u53f7\u6574\u6570<\/li>\n<li> <strong>INT<\/strong>\uff1a\u8303\u56f4\u4e3a -2,147,483,648 \u81f3 2,147,483,647 \u7684 32 \u4f4d\u6709\u7b26\u53f7\u6574\u6570<\/li>\n<li> <strong>BIGINT<\/strong>\uff1a\u8303\u56f4\u4e3a -9,223,372,036,854,775,808 \u81f3 9,223,372,036,854,775,807 \u7684 64 \u4f4d\u6709\u7b26\u53f7\u6574\u6570<\/li>\n<\/ul>\n<p><strong>\u6d6e\u70b9\u7c7b\u578b\uff1a<\/strong><\/p>\n<ul>\n<li> <strong>FLOAT<\/strong>\uff1a\u5177\u6709\u6d6e\u52a8\u5c0f\u6570\u70b9\u7684 32 \u4f4d\u6d6e\u70b9\u6570<\/li>\n<li> <strong>REAL<\/strong>\uff1a\u4e0e FLOAT \u7b49\u6548\uff0c\u63d0\u4f9b\u5355\u7cbe\u5ea6\u6d6e\u70b9\u6570<\/li>\n<li> <strong>DOUBLE<\/strong>\uff1a\u5177\u6709\u6d6e\u52a8\u5c0f\u6570\u70b9\u7684 64 \u4f4d\u6d6e\u70b9\u6570<\/li>\n<\/ul>\n<p><strong>DECIMAL \u7c7b\u578b\uff1a<\/strong><\/p>\n<ul>\n<li> <strong>DECIMAL<\/strong>\uff1a\u5141\u8bb8\u6307\u5b9a\u7cbe\u5ea6\u548c\u5c0f\u6570\u70b9\u4f4d\u7f6e\u7684\u5b9a\u70b9\u5c0f\u6570\u7c7b\u578b<\/li>\n<\/ul>\n<p><strong>\u9009\u62e9\u6570\u5b57\u7c7b\u578b\u7684\u51c6\u5219\uff1a<\/strong><\/p>\n<p>\u9009\u62e9\u5408\u9002\u7684\u6570\u5b57\u7c7b\u578b\u65f6\uff0c\u8bf7\u8003\u8651\u4ee5\u4e0b\u56e0\u7d20\uff1a<\/p>\n<ul>\n<li> <strong>\u6570\u5b57\u8303\u56f4\uff1a<\/strong>\u9009\u62e9\u80fd\u591f\u5bb9\u7eb3\u9884\u671f\u6700\u5927\u503c\u7684\u7c7b\u578b\u3002<\/li>\n<li> <strong>\u7cbe\u5ea6\uff1a<\/strong>\u5982\u679c\u9700\u8981\u7cbe\u786e\u7684\u8ba1\u7b97\uff0c\u8bf7\u4f7f\u7528\u5177\u6709\u66f4\u9ad8\u7cbe\u5ea6\u7684\u7c7b\u578b\u3002<\/li>\n<li> <strong>\u5b58\u50a8\u9700\u6c42\uff1a<\/strong>\u8f83\u5c0f\u7684\u6570\u636e\u7c7b\u578b\u5360\u7528\u8f83\u5c11\u7684\u5b58\u50a8\u7a7a\u95f4\u3002<\/li>\n<li> <strong>\u6027\u80fd\uff1a<\/strong>\u67d0\u4e9b\u7c7b\u578b\u5728\u7279\u5b9a\u64cd\u4f5c\u4e2d\u53ef\u80fd\u5177\u6709\u66f4\u597d\u7684\u6027\u80fd\u3002<\/li>\n<\/ul>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<ul>\n<li>\u5b58\u50a8\u5458\u5de5 ID \u7b49\u5c0f\u578b\u6574\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528 TINYINT \u6216 SMALLINT \u7c7b\u578b\u3002<\/li>\n<li>\u5b58\u50a8\u91d1\u989d\u7b49\u8f83\u5927\u6574\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528 INT \u6216 BIGINT \u7c7b\u578b\u3002<\/li>\n<li>\u5b58\u50a8\u5177\u6709\u5c0f\u6570\u70b9\u7684\u6d4b\u91cf\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528 FLOAT\u3001DOUBLE \u6216 DECIMAL \u7c7b\u578b\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662f\u6570\u5b57\u7c7b\u578b\u600e\u4e48\u8868\u793a\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>mysql \u63d0\u4f9b\u4e86\u591a\u79cd\u6570\u5b57\u7c7b\u578b\uff0c\u5305\u62ec\u6574\u6570\uff08tinyint\u3001smallint\u3001mediumint\u3001int\u3001bigint\uff09\u548c\u6d6e\u70b9\u7c7b\u578b\uff08float\u3001real\u3001double\uff09\u3002\u9009\u62e9\u6570\u5b57\u7c7b\u578b\u65f6\uff0c\u8bf7\u8003\u8651\u6570\u5b57\u8303\u56f4\u3001\u7cbe\u5ea6\u3001\u5b58\u50a8\u9700\u6c42\u548c\u6027\u80fd\u3002 MySQL \u6570\u5b57\u7c7b\u578b\u8868\u793a MySQL \u63d0\u4f9b\u4e86\u591a\u79cd\u6570\u5b57\u7c7b\u578b\u6765\u8868\u793a\u4e0d\u540c\u7684\u6570\u5b57\u8303\u56f4\u548c\u7cbe\u5ea6\u8981\u6c42\u3002\u8fd9\u4e9b\u7c7b\u578b\u5305\u62ec\uff1a \u6574\u6570\u7c7b\u578b\uff1a TINYINT\uff1a\u8303\u56f4\u4e3a -128 \u81f3 127 \u7684 8 \u4f4d\u6709\u7b26\u53f7\u6574\u6570 SMALLINT\uff1a\u8303\u56f4\u4e3a -32,768 \u81f3 32,767 \u7684 16 \u4f4d\u6709\u7b26\u53f7\u6574\u6570 MEDIUMINT\uff1a\u8303\u56f4\u4e3a -8,388,608 \u81f3 8,388,607 \u7684 24 \u4f4d\u6709\u7b26\u53f7\u6574\u6570 INT\uff1a\u8303\u56f4\u4e3a -2,147,483,648 \u81f3 2,147,483,647 \u7684 32 \u4f4d\u6709\u7b26\u53f7\u6574\u6570 BIGINT\uff1a\u8303\u56f4\u4e3a -9,223,372,036,854,775,808 \u81f3 9,223,372,036,854,775,807 \u7684 64 \u4f4d\u6709\u7b26\u53f7\u6574\u6570 \u6d6e\u70b9\u7c7b\u578b\uff1a FLOAT\uff1a\u5177\u6709\u6d6e\u52a8\u5c0f\u6570\u70b9\u7684 32 \u4f4d\u6d6e\u70b9\u6570 REAL\uff1a\u4e0e FLOAT \u7b49\u6548\uff0c\u63d0\u4f9b\u5355\u7cbe\u5ea6\u6d6e\u70b9\u6570 DOUBLE\uff1a\u5177\u6709\u6d6e\u52a8\u5c0f\u6570\u70b9\u7684 64 \u4f4d\u6d6e\u70b9\u6570 DECIMAL \u7c7b\u578b\uff1a DECIMAL\uff1a\u5141\u8bb8\u6307\u5b9a\u7cbe\u5ea6\u548c\u5c0f\u6570\u70b9\u4f4d\u7f6e\u7684\u5b9a\u70b9\u5c0f\u6570\u7c7b\u578b [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-5438","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5438","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=5438"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5438\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5438"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5438"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5438"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}