{"id":76710,"date":"2024-10-16T09:11:18","date_gmt":"2024-10-16T01:11:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76710\/"},"modified":"2024-10-16T09:11:18","modified_gmt":"2024-10-16T01:11:18","slug":"mysql%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%845%e7%a8%ae%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e7%b0%a1%e4%bb%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76710\/","title":{"rendered":"MySQL\u6578\u64da\u5eab\u4e2d\u76845\u7a2e\u6578\u64da\u985e\u578b\u7c21\u4ecb"},"content":{"rendered":"<h1 id=\"mysql%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%845%e7%a8%ae%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e7%b0%a1%e4%bb%8b-GytLiEQWXA\">MySQL\u6578\u64da\u5eab\u4e2d\u76845\u7a2e\u6578\u64da\u985e\u578b\u7c21\u4ecb<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u6578\u64da\u985e\u578b\u662f\u5b9a\u7fa9\u6578\u64da\u7684\u57fa\u672c\u7d44\u6210\u90e8\u5206\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\u4ecb\u7d39MySQL\u4e2d\u7684\u4e94\u7a2e\u4e3b\u8981\u6578\u64da\u985e\u578b\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u4f86\u8a2d\u8a08\u6578\u64da\u5eab\u3002<\/p>\n<h2 id=\"1-%e6%95%b4%e6%95%b8%e9%a1%9e%e5%9e%8b%ef%bc%88integer-types%ef%bc%89-GytLiEQWXA\">1. \u6574\u6578\u985e\u578b\uff08Integer Types\uff09<\/h2>\n<p>\u6574\u6578\u985e\u578b\u7528\u65bc\u5b58\u5132\u6574\u6578\u503c\uff0cMySQL\u63d0\u4f9b\u4e86\u591a\u7a2e\u6574\u6578\u985e\u578b\uff0c\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>\u6574\u6578\u985e\u578b\u9069\u5408\u7528\u65bc\u5b58\u5132\u8a08\u6578\u3001ID\u7b49\u6578\u64da\u3002<\/p>\n<h2 id=\"2-%e6%b5%ae%e9%bb%9e%e6%95%b8%e9%a1%9e%e5%9e%8b%ef%bc%88floating-point-types%ef%bc%89-GytLiEQWXA\">2. \u6d6e\u9ede\u6578\u985e\u578b\uff08Floating-Point Types\uff09<\/h2>\n<p>\u6d6e\u9ede\u6578\u985e\u578b\u7528\u65bc\u5b58\u5132\u5e36\u5c0f\u6578\u7684\u6578\u503c\uff0c\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\u3002<\/li>\n<li><code>DOUBLE<\/code>: \u7528\u65bc\u5b58\u5132\u96d9\u7cbe\u5ea6\u6d6e\u9ede\u6578\uff0c\u4f54\u75288\u500b\u5b57\u7bc0\u3002<\/li>\n<li><code>DECIMAL<\/code>: \u7528\u65bc\u5b58\u5132\u7cbe\u78ba\u7684\u5c0f\u6578\uff0c\u7279\u5225\u9069\u5408\u91d1\u878d\u8a08\u7b97\uff0c\u4f54\u7528\u7684\u5b57\u7bc0\u6578\u6839\u64da\u5b9a\u7fa9\u7684\u7cbe\u5ea6\u800c\u7570\u3002<\/li>\n<\/ul>\n<p>\u6d6e\u9ede\u6578\u985e\u578b\u9069\u5408\u7528\u65bc\u9700\u8981\u9ad8\u7cbe\u5ea6\u7684\u8a08\u7b97\uff0c\u5982\u8ca1\u52d9\u5831\u8868\u7b49\u3002<\/p>\n<h2 id=\"3-%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%a1%9e%e5%9e%8b%ef%bc%88string-types%ef%bc%89-GytLiEQWXA\">3. \u5b57\u7b26\u4e32\u985e\u578b\uff08String Types\uff09<\/h2>\n<p>\u5b57\u7b26\u4e32\u985e\u578b\u7528\u65bc\u5b58\u5132\u6587\u672c\u6578\u64da\uff0cMySQL\u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff1a<\/p>\n<ul>\n<li><code>CHAR<\/code>: \u56fa\u5b9a\u9577\u5ea6\u7684\u5b57\u7b26\u4e32\uff0c\u6700\u5927\u9577\u5ea6\u70ba255\u500b\u5b57\u7b26\u3002<\/li>\n<li><code>VARCHAR<\/code>: \u53ef\u8b8a\u9577\u5ea6\u7684\u5b57\u7b26\u4e32\uff0c\u6700\u5927\u9577\u5ea6\u70ba65,535\u500b\u5b57\u7b26\u3002<\/li>\n<li><code>TINYTEXT<\/code>: \u6700\u591a\u53ef\u5b58\u5132255\u500b\u5b57\u7b26\u7684\u6587\u672c\u3002<\/li>\n<li><code>TEXT<\/code>: \u6700\u591a\u53ef\u5b58\u513265,535\u500b\u5b57\u7b26\u7684\u6587\u672c\u3002<\/li>\n<li><code>BLOB<\/code>: \u7528\u65bc\u5b58\u5132\u4e8c\u9032\u5236\u6578\u64da\uff0c\u6700\u5927\u9577\u5ea6\u70ba65,535\u500b\u5b57\u7bc0\u3002<\/li>\n<\/ul>\n<p>\u5b57\u7b26\u4e32\u985e\u578b\u9069\u5408\u7528\u65bc\u5b58\u5132\u7528\u6236\u540d\u3001\u5730\u5740\u7b49\u6587\u672c\u4fe1\u606f\u3002<\/p>\n<h2 id=\"4-%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93%e9%a1%9e%e5%9e%8b%ef%bc%88date-and-time-types%ef%bc%89-GytLiEQWXA\">4. \u65e5\u671f\u548c\u6642\u9593\u985e\u578b\uff08Date and Time Types\uff09<\/h2>\n<p>MySQL\u63d0\u4f9b\u4e86\u591a\u7a2e\u65e5\u671f\u548c\u6642\u9593\u985e\u578b\uff0c\u7528\u65bc\u5b58\u5132\u6642\u9593\u76f8\u95dc\u7684\u6578\u64da\uff1a<\/p>\n<ul>\n<li><code>DATE<\/code>: \u5b58\u5132\u65e5\u671f\uff0c\u683c\u5f0f\u70ba &#8216;YYYY-MM-DD&#8217;\u3002<\/li>\n<li><code>TIME<\/code>: \u5b58\u5132\u6642\u9593\uff0c\u683c\u5f0f\u70ba &#8216;HH:MM:SS&#8217;\u3002<\/li>\n<li><code>DATETIME<\/code>: \u5b58\u5132\u65e5\u671f\u548c\u6642\u9593\uff0c\u683c\u5f0f\u70ba &#8216;YYYY-MM-DD HH:MM:SS&#8217;\u3002<\/li>\n<li><code>TIMESTAMP<\/code>: \u5b58\u5132\u6642\u9593\u6233\uff0c\u901a\u5e38\u7528\u65bc\u8a18\u9304\u6578\u64da\u7684\u5275\u5efa\u6216\u66f4\u65b0\u6642\u9593\u3002<\/li>\n<\/ul>\n<p>\u65e5\u671f\u548c\u6642\u9593\u985e\u578b\u9069\u5408\u7528\u65bc\u5b58\u5132\u4e8b\u4ef6\u7684\u767c\u751f\u6642\u9593\u3001\u7528\u6236\u8a3b\u518a\u6642\u9593\u7b49\u3002<\/p>\n<h2 id=\"5-%e5%b8%83%e7%88%be%e9%a1%9e%e5%9e%8b%ef%bc%88boolean-type%ef%bc%89-GytLiEQWXA\">5. \u5e03\u723e\u985e\u578b\uff08Boolean Type\uff09<\/h2>\n<p>\u5e03\u723e\u985e\u578b\u7528\u65bc\u5b58\u5132\u771f\u6216\u5047\u7684\u503c\uff0cMySQL\u4e2d\u901a\u5e38\u4f7f\u7528\u6574\u6578\u4f86\u8868\u793a\uff1a<\/p>\n<ul>\n<li><code>BOOLEAN<\/code>: \u5be6\u969b\u4e0a\u662f <code>TINYINT(1)<\/code>\uff0c0\u8868\u793a\u5047\uff0c1\u8868\u793a\u771f\u3002<\/li>\n<\/ul>\n<p>\u5e03\u723e\u985e\u578b\u9069\u5408\u7528\u65bc\u5b58\u5132\u958b\u95dc\u72c0\u614b\uff0c\u5982\u7528\u6236\u662f\u5426\u555f\u7528\u67d0\u9805\u529f\u80fd\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-GytLiEQWXA\">\u7e3d\u7d50<\/h2>\n<p>\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u5c0d\u65bc\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u5b58\u5132\u6548\u7387\u81f3\u95dc\u91cd\u8981\u3002\u4e86\u89e3MySQL\u4e2d\u7684\u5404\u7a2e\u6578\u64da\u985e\u578b\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u8a2d\u8a08\u6578\u64da\u5eab\u7d50\u69cb\uff0c\u5f9e\u800c\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u3002\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\u4ee5\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u6578\u64da\u5eab\u4e2d\u7684\u4e94\u7a2e\u4e3b\u8981\u6578\u64da\u985e\u578b\uff0c\u5305\u62ec\u6574\u6578\u3001\u6d6e\u9ede\u6578\u3001\u5b57\u7b26\u4e32\u3001\u65e5\u671f\u548c\u6642\u9593\uff0c\u52a9\u60a8\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u683c\u5f0f\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-76710","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76710","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=76710"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76710\/revisions"}],"predecessor-version":[{"id":76711,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76710\/revisions\/76711"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76710"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76710"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76710"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}