{"id":161177,"date":"2024-11-04T04:15:25","date_gmt":"2024-11-03T20:15:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/161177\/"},"modified":"2024-11-04T04:15:26","modified_gmt":"2024-11-03T20:15:26","slug":"%e5%9f%ba%e7%a4%8e%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9f%a5%e8%ad%98%ef%bc%9adecimal-%e5%ad%97%e6%ae%b5%e7%9a%84%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%ad%97%e6%ae%b5-decimal","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/161177\/","title":{"rendered":"\u57fa\u790e\u6578\u64da\u5eab\u77e5\u8b58\uff1adecimal \u5b57\u6bb5\u7684\u4f7f\u7528\u65b9\u6cd5 (\u6578\u64da\u5eab\u5b57\u6bb5 decimal)"},"content":{"rendered":"<h1 id=\"%e5%9f%ba%e7%a4%8e%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9f%a5%e8%ad%98%ef%bc%9adecimal-%e5%ad%97%e6%ae%b5%e7%9a%84%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95-BycvkVpQMg\">\u57fa\u790e\u6578\u64da\u5eab\u77e5\u8b58\uff1adecimal \u5b57\u6bb5\u7684\u4f7f\u7528\u65b9\u6cd5<\/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\u6e96\u78ba\u6027\u548c\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002<code>decimal<\/code> \u5b57\u6bb5\u662f\u4e00\u7a2e\u5e38\u7528\u7684\u6578\u64da\u985e\u578b\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u7cbe\u78ba\u8868\u793a\u6578\u5b57\u7684\u60c5\u6cc1\u4e0b\uff0c\u4f8b\u5982\u91d1\u878d\u8a08\u7b97\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e <code>decimal<\/code> \u5b57\u6bb5\u7684\u7279\u6027\u3001\u4f7f\u7528\u65b9\u6cd5\u53ca\u5176\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-decimal-%e5%ad%97%e6%ae%b5%ef%bc%9f-BycvkVpQMg\">\u4ec0\u9ebc\u662f decimal \u5b57\u6bb5\uff1f<\/h2>\n<p><code>decimal<\/code> \u5b57\u6bb5\u662f\u4e00\u7a2e\u7cbe\u78ba\u7684\u6578\u5b57\u6578\u64da\u985e\u578b\uff0c\u901a\u5e38\u7528\u65bc\u5b58\u5132\u9700\u8981\u9ad8\u7cbe\u5ea6\u7684\u6578\u5b57\uff0c\u4f8b\u5982\u8ca8\u5e63\u91d1\u984d\u3002\u8207\u6d6e\u9ede\u6578\uff08<code>float<\/code> \u6216 <code>double<\/code>\uff09\u4e0d\u540c\uff0c<code>decimal<\/code> \u5b57\u6bb5\u4e0d\u6703\u56e0\u70ba\u56db\u6368\u4e94\u5165\u800c\u5c0e\u81f4\u7cbe\u5ea6\u640d\u5931\u3002\u9019\u4f7f\u5f97\u5b83\u5728\u91d1\u878d\u61c9\u7528\u4e2d\u5c24\u70ba\u91cd\u8981\uff0c\u56e0\u70ba\u5373\u4f7f\u662f\u5fae\u5c0f\u7684\u8aa4\u5dee\u4e5f\u53ef\u80fd\u5c0e\u81f4\u91cd\u5927\u640d\u5931\u3002<\/p>\n<h2 id=\"decimal-%e5%ad%97%e6%ae%b5%e7%9a%84%e5%ae%9a%e7%be%a9-BycvkVpQMg\">decimal \u5b57\u6bb5\u7684\u5b9a\u7fa9<\/h2>\n<p>\u5728 SQL \u4e2d\uff0c<code>decimal<\/code> \u5b57\u6bb5\u7684\u5b9a\u7fa9\u901a\u5e38\u5305\u62ec\u5169\u500b\u53c3\u6578\uff1a\u7cbe\u5ea6\uff08<code>precision<\/code>\uff09\u548c\u5c0f\u6578\u4f4d\u6578\uff08<code>scale<\/code>\uff09\u3002\u7cbe\u5ea6\u662f\u6307\u6578\u5b57\u7684\u7e3d\u4f4d\u6578\uff0c\u800c\u5c0f\u6578\u4f4d\u6578\u5247\u662f\u5c0f\u6578\u9ede\u5f8c\u7684\u4f4d\u6578\u3002\u4f8b\u5982\uff0c<code>decimal(10, 2)<\/code> \u8868\u793a\u9019\u500b\u5b57\u6bb5\u53ef\u4ee5\u5b58\u5132\u6700\u591a 10 \u4f4d\u6578\u5b57\uff0c\u5176\u4e2d 2 \u4f4d\u662f\u5c0f\u6578\u4f4d\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b-BycvkVpQMg\">\u7bc4\u4f8b<\/h3>\n<pre><code>CREATE TABLE products (\n    id INT PRIMARY KEY,\n    name VARCHAR(100),\n    price DECIMAL(10, 2)\n);\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c<code>price<\/code> \u5b57\u6bb5\u88ab\u5b9a\u7fa9\u70ba <code>decimal(10, 2)<\/code>\uff0c\u9019\u610f\u5473\u8457\u5b83\u53ef\u4ee5\u5b58\u5132\u7684\u6700\u5927\u503c\u70ba 99999999.99\u3002<\/p>\n<h2 id=\"decimal-%e5%ad%97%e6%ae%b5%e7%9a%84%e5%84%aa%e5%8b%a2-BycvkVpQMg\">decimal \u5b57\u6bb5\u7684\u512a\u52e2<\/h2>\n<ul>\n<li><strong>\u9ad8\u7cbe\u5ea6\uff1a<\/strong>\u9069\u5408\u9700\u8981\u7cbe\u78ba\u8a08\u7b97\u7684\u61c9\u7528\uff0c\u5982\u8ca1\u52d9\u5831\u8868\u548c\u8a08\u7b97\u5229\u606f\u3002<\/li>\n<li><strong>\u907f\u514d\u6d6e\u9ede\u8aa4\u5dee\uff1a<\/strong>\u5728\u9032\u884c\u6578\u5b78\u904b\u7b97\u6642\uff0c<code>decimal<\/code> \u5b57\u6bb5\u4e0d\u6703\u51fa\u73fe\u6d6e\u9ede\u6578\u7684\u7cbe\u5ea6\u554f\u984c\u3002<\/li>\n<li><strong>\u9748\u6d3b\u6027\uff1a<\/strong>\u53ef\u4ee5\u6839\u64da\u9700\u6c42\u8abf\u6574\u7cbe\u5ea6\u548c\u5c0f\u6578\u4f4d\u6578\uff0c\u9069\u61c9\u4e0d\u540c\u7684\u61c9\u7528\u5834\u666f\u3002<\/li>\n<\/ul>\n<h2 id=\"decimal-%e5%ad%97%e6%ae%b5%e7%9a%84%e4%bd%bf%e7%94%a8%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-BycvkVpQMg\">decimal \u5b57\u6bb5\u7684\u4f7f\u7528\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5118\u7ba1 <code>decimal<\/code> \u5b57\u6bb5\u6709\u8a31\u591a\u512a\u52e2\uff0c\u4f46\u5728\u4f7f\u7528\u6642\u4ecd\u9700\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li><strong>\u6027\u80fd\u8003\u91cf\uff1a<\/strong>\u7531\u65bc <code>decimal<\/code> \u5b57\u6bb5\u7684\u8a08\u7b97\u6bd4\u6574\u6578\u548c\u6d6e\u9ede\u6578\u66f4\u70ba\u8907\u96dc\uff0c\u56e0\u6b64\u5728\u9ad8\u6027\u80fd\u9700\u6c42\u7684\u61c9\u7528\u4e2d\uff0c\u61c9\u8b39\u614e\u4f7f\u7528\u3002<\/li>\n<li><strong>\u5b58\u5132\u7a7a\u9593\uff1a<\/strong>\u76f8\u8f03\u65bc\u5176\u4ed6\u6578\u64da\u985e\u578b\uff0c<code>decimal<\/code> \u5b57\u6bb5\u53ef\u80fd\u4f54\u7528\u66f4\u591a\u7684\u5b58\u5132\u7a7a\u9593\uff0c\u7279\u5225\u662f\u5728\u9ad8\u7cbe\u5ea6\u7684\u60c5\u6cc1\u4e0b\u3002<\/li>\n<li><strong>\u6578\u64da\u9a57\u8b49\uff1a<\/strong>\u5728\u63d2\u5165\u6578\u64da\u6642\uff0c\u9700\u78ba\u4fdd\u6578\u64da\u7b26\u5408\u5b9a\u7fa9\u7684\u7cbe\u5ea6\u548c\u5c0f\u6578\u4f4d\u6578\uff0c\u5426\u5247\u6703\u5c0e\u81f4\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-BycvkVpQMg\">\u7d50\u8ad6<\/h2>\n<p>\u7e3d\u7d50\u4f86\u8aaa\uff0c<code>decimal<\/code> \u5b57\u6bb5\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u626e\u6f14\u8457\u91cd\u8981\u7684\u89d2\u8272\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u9ad8\u7cbe\u5ea6\u7684\u6578\u5b57\u8868\u793a\u6642\u3002\u901a\u904e\u6b63\u78ba\u7684\u4f7f\u7528\u548c\u7406\u89e3\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u5229\u7528\u9019\u4e00\u6578\u64da\u985e\u578b\u4f86\u6eff\u8db3\u5404\u7a2e\u61c9\u7528\u9700\u6c42\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u53ef\u9760\u7684\u6578\u64da\u5b58\u5132\u89e3\u6c7a\u65b9\u6848\u7684\u4f01\u696d\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u8a2d\u8a08\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\u4e0d\u540c\u696d\u52d9\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f\u5176\u4ed6\u96f2\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u57fa\u790e\u6578\u64da\u5eab\u77e5\u8b58\uff0c\u638c\u63e1 decimal \u5b57\u6bb5\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u78ba\u4fdd\u6578\u64da\u7cbe\u78ba\u6027\u8207\u8a08\u7b97\u6e96\u78ba\u6027\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-161177","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161177","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=161177"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161177\/revisions"}],"predecessor-version":[{"id":161178,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161177\/revisions\/161178"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=161177"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=161177"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=161177"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}