{"id":160047,"date":"2024-11-03T19:50:23","date_gmt":"2024-11-03T11:50:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160047\/"},"modified":"2024-11-03T19:50:24","modified_gmt":"2024-11-03T11:50:24","slug":"mysql-%e6%95%99%e7%a8%8b-mysql-%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160047\/","title":{"rendered":"MYSQL \u6559\u7a0b MySQL \u6578\u64da\u985e\u578b"},"content":{"rendered":"<h1 id=\"mysql-%e6%95%99%e7%a8%8b%ef%bc%9amysql-%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-BQZXqFBjlG\">MySQL \u6559\u7a0b\uff1aMySQL \u6578\u64da\u985e\u578b<\/h1>\n<p>MySQL \u662f\u4e00\u7a2e\u6d41\u884c\u7684\u958b\u6e90\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u4e86\u89e3 MySQL \u7684\u6578\u64da\u985e\u578b\u5c0d\u65bc\u8a2d\u8a08\u9ad8\u6548\u7684\u6578\u64da\u5eab\u7d50\u69cb\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e MySQL \u4e2d\u7684\u6578\u64da\u985e\u578b\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u4ee5\u6eff\u8db3\u5176\u61c9\u7528\u9700\u6c42\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e6%a6%82%e8%bf%b0-BQZXqFBjlG\">\u6578\u64da\u985e\u578b\u6982\u8ff0<\/h2>\n<p>MySQL \u7684\u6578\u64da\u985e\u578b\u53ef\u4ee5\u5206\u70ba\u5e7e\u500b\u4e3b\u8981\u985e\u5225\uff0c\u5305\u62ec\u6578\u503c\u985e\u578b\u3001\u65e5\u671f\u548c\u6642\u9593\u985e\u578b\u3001\u5b57\u7b26\u4e32\u985e\u578b\u7b49\u3002\u6bcf\u7a2e\u985e\u578b\u90fd\u6709\u5176\u7279\u5b9a\u7684\u7528\u9014\u548c\u9650\u5236\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u5b58\u5132\u6548\u7387\u3002<\/p>\n<h2 id=\"1-%e6%95%b8%e5%80%bc%e9%a1%9e%e5%9e%8b-BQZXqFBjlG\">1. \u6578\u503c\u985e\u578b<\/h2>\n<p>\u6578\u503c\u985e\u578b\u7528\u65bc\u5b58\u5132\u6578\u5b57\u6578\u64da\uff0c\u4e3b\u8981\u5206\u70ba\u6574\u6578\u985e\u578b\u548c\u6d6e\u9ede\u6578\u985e\u578b\u3002<\/p>\n<h3 id=\"%e6%95%b4%e6%95%b8%e9%a1%9e%e5%9e%8b-BQZXqFBjlG\">\u6574\u6578\u985e\u578b<\/h3>\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\u7528 1 \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\u7528 2 \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\u7528 3 \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\u7528 4 \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\u7528 8 \u5b57\u7bc0\u3002<\/li>\n<\/ul>\n<h3 id=\"%e6%b5%ae%e9%bb%9e%e6%95%b8%e9%a1%9e%e5%9e%8b-BQZXqFBjlG\">\u6d6e\u9ede\u6578\u985e\u578b<\/h3>\n<ul>\n<li><code>FLOAT<\/code>: \u7528\u65bc\u5b58\u5132\u55ae\u7cbe\u5ea6\u6d6e\u9ede\u6578\uff0c\u4f54\u7528 4 \u5b57\u7bc0\u3002<\/li>\n<li><code>DOUBLE<\/code>: \u7528\u65bc\u5b58\u5132\u96d9\u7cbe\u5ea6\u6d6e\u9ede\u6578\uff0c\u4f54\u7528 8 \u5b57\u7bc0\u3002<\/li>\n<li><code>DECIMAL<\/code>: \u7528\u65bc\u5b58\u5132\u7cbe\u78ba\u7684\u6578\u503c\uff0c\u7279\u5225\u9069\u5408\u8ca1\u52d9\u8a08\u7b97\uff0c\u4f54\u7528\u7684\u5b57\u7bc0\u6578\u6839\u64da\u5b9a\u7fa9\u7684\u7cbe\u5ea6\u800c\u7570\u3002<\/li>\n<\/ul>\n<h2 id=\"2-%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93%e9%a1%9e%e5%9e%8b-BQZXqFBjlG\">2. \u65e5\u671f\u548c\u6642\u9593\u985e\u578b<\/h2>\n<p>MySQL \u63d0\u4f9b\u4e86\u591a\u7a2e\u65e5\u671f\u548c\u6642\u9593\u985e\u578b\uff0c\u4ee5\u4fbf\u5b58\u5132\u6642\u9593\u76f8\u95dc\u7684\u6578\u64da\u3002<\/p>\n<ul>\n<li><code>DATE<\/code>: \u7528\u65bc\u5b58\u5132\u65e5\u671f\uff0c\u683c\u5f0f\u70ba &#8216;YYYY-MM-DD&#8217;\uff0c\u4f54\u7528 3 \u5b57\u7bc0\u3002<\/li>\n<li><code>TIME<\/code>: \u7528\u65bc\u5b58\u5132\u6642\u9593\uff0c\u683c\u5f0f\u70ba &#8216;HH:MM:SS&#8217;\uff0c\u4f54\u7528 3 \u5b57\u7bc0\u3002<\/li>\n<li><code>DATETIME<\/code>: \u7528\u65bc\u5b58\u5132\u65e5\u671f\u548c\u6642\u9593\uff0c\u683c\u5f0f\u70ba &#8216;YYYY-MM-DD HH:MM:SS&#8217;\uff0c\u4f54\u7528 8 \u5b57\u7bc0\u3002<\/li>\n<li><code>TIMESTAMP<\/code>: \u7528\u65bc\u5b58\u5132\u6642\u9593\u6233\uff0c\u683c\u5f0f\u70ba &#8216;YYYY-MM-DD HH:MM:SS&#8217;\uff0c\u4f54\u7528 4 \u5b57\u7bc0\u3002<\/li>\n<li><code>YEAR<\/code>: \u7528\u65bc\u5b58\u5132\u5e74\u4efd\uff0c\u683c\u5f0f\u70ba &#8216;YYYY&#8217;\uff0c\u4f54\u7528 1 \u5b57\u7bc0\u3002<\/li>\n<\/ul>\n<h2 id=\"3-%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%a1%9e%e5%9e%8b-BQZXqFBjlG\">3. \u5b57\u7b26\u4e32\u985e\u578b<\/h2>\n<p>\u5b57\u7b26\u4e32\u985e\u578b\u7528\u65bc\u5b58\u5132\u6587\u672c\u6578\u64da\uff0cMySQL \u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\u3002<\/p>\n<ul>\n<li><code>CHAR<\/code>: \u56fa\u5b9a\u9577\u5ea6\u5b57\u7b26\u4e32\uff0c\u6700\u5927\u9577\u5ea6\u70ba 255 \u5b57\u7b26\uff0c\u4f54\u7528\u7684\u5b57\u7bc0\u6578\u7b49\u65bc\u5b9a\u7fa9\u7684\u9577\u5ea6\u3002<\/li>\n<li><code>VARCHAR<\/code>: \u53ef\u8b8a\u9577\u5ea6\u5b57\u7b26\u4e32\uff0c\u6700\u5927\u9577\u5ea6\u70ba 65,535 \u5b57\u7b26\uff0c\u4f54\u7528\u7684\u5b57\u7bc0\u6578\u53d6\u6c7a\u65bc\u5be6\u969b\u5b58\u5132\u7684\u5b57\u7b26\u6578\u3002<\/li>\n<li><code>TINYTEXT<\/code>: \u6700\u5927\u9577\u5ea6\u70ba 255 \u5b57\u7b26\u7684\u6587\u672c\uff0c\u4f54\u7528\u7684\u5b57\u7bc0\u6578\u53d6\u6c7a\u65bc\u5be6\u969b\u5b58\u5132\u7684\u5b57\u7b26\u6578\u3002<\/li>\n<li><code>TEXT<\/code>: \u6700\u5927\u9577\u5ea6\u70ba 65,535 \u5b57\u7b26\u7684\u6587\u672c\uff0c\u4f54\u7528\u7684\u5b57\u7bc0\u6578\u53d6\u6c7a\u65bc\u5be6\u969b\u5b58\u5132\u7684\u5b57\u7b26\u6578\u3002<\/li>\n<li><code>BLOB<\/code>: \u7528\u65bc\u5b58\u5132\u4e8c\u9032\u5236\u6578\u64da\uff0c\u6700\u5927\u9577\u5ea6\u70ba 65,535 \u5b57\u7b26\uff0c\u4f54\u7528\u7684\u5b57\u7bc0\u6578\u53d6\u6c7a\u65bc\u5be6\u969b\u5b58\u5132\u7684\u6578\u64da\u5927\u5c0f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e9%81%b8%e6%93%87%e5%90%88%e9%81%a9%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-BQZXqFBjlG\">\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b<\/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\u958b\u767c\u8005\u61c9\u6839\u64da\u5be6\u969b\u9700\u6c42\u9078\u64c7\u6700\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u9700\u8981\u5b58\u5132\u5927\u91cf\u6578\u64da\u7684\u61c9\u7528\uff0c\u61c9\u8003\u616e\u4f7f\u7528 <code>TEXT<\/code> \u6216 <code>BLOB<\/code> \u985e\u578b\uff0c\u800c\u5c0d\u65bc\u9700\u8981\u9032\u884c\u6578\u5b78\u8a08\u7b97\u7684\u6578\u64da\uff0c\u5247\u61c9\u9078\u64c7 <code>DECIMAL<\/code> \u6216 <code>FLOAT<\/code> \u985e\u578b\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-BQZXqFBjlG\">\u7e3d\u7d50<\/h2>\n<p>\u4e86\u89e3 MySQL \u7684\u6578\u64da\u985e\u578b\u662f\u8a2d\u8a08\u9ad8\u6548\u6578\u64da\u5eab\u7684\u57fa\u790e\u3002\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u4e0d\u50c5\u80fd\u63d0\u9ad8\u6027\u80fd\uff0c\u9084\u80fd\u7bc0\u7701\u5b58\u5132\u7a7a\u9593\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u6216 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u9700\u6c42\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u9805\u76ee\u9084\u662f\u5927\u578b\u4f01\u696d\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u548c\u7a69\u5b9a\u7684\u4f3a\u670d\u5668\u74b0\u5883\u90fd\u662f\u6210\u529f\u7684\u95dc\u9375\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2 MySQL \u6578\u64da\u985e\u578b\u7684\u8a73\u7d30\u6559\u7a0b\uff0c\u638c\u63e1\u5404\u7a2e\u6578\u64da\u985e\u578b\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u5eab\u7ba1\u7406\u6280\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-160047","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160047","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=160047"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160047\/revisions"}],"predecessor-version":[{"id":160048,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160047\/revisions\/160048"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160047"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160047"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160047"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}