{"id":153815,"date":"2024-11-02T10:35:20","date_gmt":"2024-11-02T02:35:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/153815\/"},"modified":"2024-11-02T10:35:21","modified_gmt":"2024-11-02T02:35:21","slug":"%e5%b8%b6%e6%82%a8%e6%b7%b1%e5%85%a5%e4%ba%86%e8%a7%a3sql%e5%ad%97%e6%ae%b5%e9%a1%9e%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/153815\/","title":{"rendered":"\u5e36\u60a8\u6df1\u5165\u4e86\u89e3sql\u5b57\u6bb5\u985e\u578b"},"content":{"rendered":"<h1 id=\"%e5%b8%b6%e6%82%a8%e6%b7%b1%e5%85%a5%e4%ba%86%e8%a7%a3sql%e5%ad%97%e6%ae%b5%e9%a1%9e%e5%9e%8b-LvHTXjgtov\">\u5e36\u60a8\u6df1\u5165\u4e86\u89e3SQL\u5b57\u6bb5\u985e\u578b<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\uff0c\u9078\u64c7\u6b63\u78ba\u7684\u5b57\u6bb5\u985e\u578b\u5c0d\u65bc\u6578\u64da\u7684\u5b58\u5132\u548c\u67e5\u8a62\u6548\u7387\u81f3\u95dc\u91cd\u8981\u3002SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u63d0\u4f9b\u4e86\u591a\u7a2e\u5b57\u6bb5\u985e\u578b\uff0c\u4ee5\u6eff\u8db3\u4e0d\u540c\u7684\u6578\u64da\u9700\u6c42\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eSQL\u4e2d\u7684\u4e3b\u8981\u5b57\u6bb5\u985e\u578b\uff0c\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u9078\u64c7\u5408\u9069\u7684\u5b57\u6bb5\u985e\u578b\u4f86\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\u3002<\/p>\n<h2 id=\"1-%e6%95%b4%e6%95%b8%e9%a1%9e%e5%9e%8b-LvHTXjgtov\">1. \u6574\u6578\u985e\u578b<\/h2>\n<p>\u6574\u6578\u985e\u578b\u7528\u65bc\u5b58\u5132\u6574\u6578\u503c\uff0c\u901a\u5e38\u7528\u65bc\u8a08\u6578\u6216\u7d22\u5f15\u3002SQL\u4e2d\u5e38\u898b\u7684\u6574\u6578\u985e\u578b\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>TINYINT<\/code>\uff1a\u7bc4\u570d\u5f9e -128 \u5230 127\uff08\u6216 0 \u5230 255\uff0c\u7121\u7b26\u865f\uff09\u3002<\/li>\n<li><code>SMALLINT<\/code>\uff1a\u7bc4\u570d\u5f9e -32,768 \u5230 32,767\uff08\u6216 0 \u5230 65,535\uff0c\u7121\u7b26\u865f\uff09\u3002<\/li>\n<li><code>MEDIUMINT<\/code>\uff1a\u7bc4\u570d\u5f9e -8,388,608 \u5230 8,388,607\uff08\u6216 0 \u5230 16,777,215\uff0c\u7121\u7b26\u865f\uff09\u3002<\/li>\n<li><code>INT<\/code>\uff1a\u7bc4\u570d\u5f9e -2,147,483,648 \u5230 2,147,483,647\uff08\u6216 0 \u5230 4,294,967,295\uff0c\u7121\u7b26\u865f\uff09\u3002<\/li>\n<li><code>BIGINT<\/code>\uff1a\u7bc4\u570d\u5f9e -9,223,372,036,854,775,808 \u5230 9,223,372,036,854,775,807\uff08\u6216 0 \u5230 18,446,744,073,709,551,615\uff0c\u7121\u7b26\u865f\uff09\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<\/p>\n<h2 id=\"2-%e6%b5%ae%e9%bb%9e%e6%95%b8%e9%a1%9e%e5%9e%8b-LvHTXjgtov\">2. \u6d6e\u9ede\u6578\u985e\u578b<\/h2>\n<p>\u6d6e\u9ede\u6578\u985e\u578b\u7528\u65bc\u5b58\u5132\u5e36\u5c0f\u6578\u7684\u6578\u503c\uff0c\u9069\u5408\u9700\u8981\u7cbe\u78ba\u8a08\u7b97\u7684\u60c5\u6cc1\u3002SQL\u4e2d\u4e3b\u8981\u7684\u6d6e\u9ede\u6578\u985e\u578b\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>FLOAT<\/code>\uff1a\u55ae\u7cbe\u5ea6\u6d6e\u9ede\u6578\uff0c\u901a\u5e38\u4f54\u75284\u500b\u5b57\u7bc0\u3002<\/li>\n<li><code>DOUBLE<\/code>\uff1a\u96d9\u7cbe\u5ea6\u6d6e\u9ede\u6578\uff0c\u901a\u5e38\u4f54\u75288\u500b\u5b57\u7bc0\u3002<\/li>\n<li><code>DECIMAL<\/code>\uff1a\u7cbe\u78ba\u7684\u6578\u503c\u985e\u578b\uff0c\u9069\u5408\u5b58\u5132\u91d1\u984d\u7b49\u9700\u8981\u9ad8\u7cbe\u5ea6\u7684\u6578\u64da\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5b58\u5132\u91d1\u984d\uff0c\u53ef\u4ee5\u4f7f\u7528<code>DECIMAL(10,2)<\/code>\uff0c\u8868\u793a\u6700\u591a10\u4f4d\u6578\u5b57\uff0c\u5176\u4e2d2\u4f4d\u70ba\u5c0f\u6578\u3002<\/p>\n<h2 id=\"3-%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%a1%9e%e5%9e%8b-LvHTXjgtov\">3. \u5b57\u7b26\u4e32\u985e\u578b<\/h2>\n<p>\u5b57\u7b26\u4e32\u985e\u578b\u7528\u65bc\u5b58\u5132\u6587\u672c\u6578\u64da\u3002SQL\u4e2d\u5e38\u898b\u7684\u5b57\u7b26\u4e32\u985e\u578b\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>CHAR(n)<\/code>\uff1a\u56fa\u5b9a\u9577\u5ea6\u7684\u5b57\u7b26\u4e32\uff0c\u9577\u5ea6\u70ban\uff0c\u82e5\u4e0d\u8db3n\u5247\u7528\u7a7a\u683c\u586b\u5145\u3002<\/li>\n<li><code>VARCHAR(n)<\/code>\uff1a\u53ef\u8b8a\u9577\u5ea6\u7684\u5b57\u7b26\u4e32\uff0c\u6700\u5927\u9577\u5ea6\u70ban\uff0c\u6839\u64da\u5be6\u969b\u5b58\u5132\u7684\u5b57\u7b26\u6578\u91cf\u4f54\u7528\u7a7a\u9593\u3002<\/li>\n<li><code>TEXT<\/code>\uff1a\u53ef\u5b58\u5132\u9577\u6587\u672c\uff0c\u6700\u5927\u9577\u5ea6\u70ba65,535\u500b\u5b57\u7b26\u3002<\/li>\n<\/ul>\n<p>\u5728\u9078\u64c7\u5b57\u7b26\u4e32\u985e\u578b\u6642\uff0c\u61c9\u8003\u616e\u6578\u64da\u7684\u9577\u5ea6\u548c\u6027\u8cea\uff0c\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\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-LvHTXjgtov\">4. \u65e5\u671f\u548c\u6642\u9593\u985e\u578b<\/h2>\n<p>\u65e5\u671f\u548c\u6642\u9593\u985e\u578b\u7528\u65bc\u5b58\u5132\u6642\u9593\u76f8\u95dc\u7684\u6578\u64da\u3002SQL\u4e2d\u4e3b\u8981\u7684\u65e5\u671f\u548c\u6642\u9593\u985e\u578b\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>DATE<\/code>\uff1a\u5b58\u5132\u65e5\u671f\uff0c\u683c\u5f0f\u70baYYYY-MM-DD\u3002<\/li>\n<li><code>TIME<\/code>\uff1a\u5b58\u5132\u6642\u9593\uff0c\u683c\u5f0f\u70baHH:MM:SS\u3002<\/li>\n<li><code>DATETIME<\/code>\uff1a\u5b58\u5132\u65e5\u671f\u548c\u6642\u9593\uff0c\u683c\u5f0f\u70baYYYY-MM-DD HH:MM:SS\u3002<\/li>\n<li><code>TIMESTAMP<\/code>\uff1a\u5b58\u5132\u81ea1970\u5e741\u67081\u65e5\u4ee5\u4f86\u7684\u79d2\u6578\uff0c\u901a\u5e38\u7528\u65bc\u8a18\u9304\u6578\u64da\u7684\u8b8a\u66f4\u6642\u9593\u3002<\/li>\n<\/ul>\n<p>\u9078\u64c7\u65e5\u671f\u548c\u6642\u9593\u985e\u578b\u6642\uff0c\u61c9\u6839\u64da\u61c9\u7528\u9700\u6c42\u4f86\u6c7a\u5b9a\u4f7f\u7528\u54ea\u4e00\u7a2e\u683c\u5f0f\u3002<\/p>\n<h2 id=\"5-%e5%b8%83%e7%88%be%e9%a1%9e%e5%9e%8b-LvHTXjgtov\">5. \u5e03\u723e\u985e\u578b<\/h2>\n<p>\u5e03\u723e\u985e\u578b\u7528\u65bc\u5b58\u5132\u771f\u6216\u5047\u7684\u503c\u3002\u5728SQL\u4e2d\uff0c\u901a\u5e38\u4f7f\u7528<code>BOOLEAN<\/code>\u6216<code>BIT<\/code>\u4f86\u8868\u793a\u5e03\u723e\u503c\u3002\u9019\u985e\u578b\u5728\u9700\u8981\u9032\u884c\u689d\u4ef6\u5224\u65b7\u6642\u975e\u5e38\u6709\u7528\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-LvHTXjgtov\">\u7e3d\u7d50<\/h2>\n<p>\u4e86\u89e3SQL\u5b57\u6bb5\u985e\u578b\u5c0d\u65bc\u6578\u64da\u5eab\u8a2d\u8a08\u81f3\u95dc\u91cd\u8981\u3002\u6b63\u78ba\u7684\u5b57\u6bb5\u985e\u578b\u4e0d\u50c5\u80fd\u63d0\u9ad8\u6578\u64da\u5b58\u5132\u7684\u6548\u7387\uff0c\u9084\u80fd\u63d0\u5347\u67e5\u8a62\u6027\u80fd\u3002\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\uff0c\u61c9\u6839\u64da\u5be6\u969b\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u5b57\u6bb5\u985e\u578b\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u6e96\u78ba\u6027\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc<code><a href=\"https:\/\/server.hk\">VPS<\/a><\/code>\u548c<code><a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a><\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u4e86\u89e3SQL\u5b57\u6bb5\u985e\u578b\uff0c\u638c\u63e1\u6578\u64da\u5eab\u8a2d\u8a08\u7684\u57fa\u790e\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\u8207\u6578\u64da\u7ba1\u7406\u80fd\u529b\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-153815","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/153815","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=153815"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/153815\/revisions"}],"predecessor-version":[{"id":153816,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/153815\/revisions\/153816"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=153815"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=153815"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=153815"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}