{"id":78488,"date":"2024-10-16T11:58:18","date_gmt":"2024-10-16T03:58:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/78488\/"},"modified":"2024-10-16T11:58:18","modified_gmt":"2024-10-16T03:58:18","slug":"mysql%e6%8c%87%e4%bb%a4-fixed%ef%bc%88%e5%ae%9a%e9%bb%9e%e6%95%b8%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/78488\/","title":{"rendered":"MySQL\u6307\u4ee4: FIXED\uff08\u5b9a\u9ede\u6578\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-fixed%ef%bc%88%e5%ae%9a%e9%bb%9e%e6%95%b8%ef%bc%89-QUzWAkFwAB\">MySQL\u6307\u4ee4: FIXED\uff08\u5b9a\u9ede\u6578\uff09<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u6578\u64da\u985e\u578b\u7684\u9078\u64c7\u5c0d\u65bc\u6578\u64da\u7684\u6e96\u78ba\u6027\u548c\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002MySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u8cc7\u6599\u5eab\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u985e\u578b\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662fFIXED\uff08\u5b9a\u9ede\u6578\uff09\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eFIXED\u6578\u64da\u985e\u578b\u7684\u7279\u6027\u3001\u4f7f\u7528\u5834\u666f\u53ca\u5176\u512a\u7f3a\u9ede\u3002<\/p>\n<h2 id=\"fixed%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e6%a6%82%e8%bf%b0-QUzWAkFwAB\">FIXED\u6578\u64da\u985e\u578b\u6982\u8ff0<\/h2>\n<p>FIXED\u6578\u64da\u985e\u578b\u662fMySQL\u4e2d\u7528\u4f86\u5b58\u5132\u5b9a\u9ede\u6578\u7684\u6578\u64da\u985e\u578b\u3002\u5b83\u7684\u4e3b\u8981\u7279\u9ede\u662f\u80fd\u5920\u4ee5\u56fa\u5b9a\u7684\u7cbe\u5ea6\u548c\u7bc4\u570d\u4f86\u5b58\u5132\u6578\u5b57\u3002\u9019\u610f\u5473\u8457\u7121\u8ad6\u6578\u64da\u7684\u5be6\u969b\u5927\u5c0f\u5982\u4f55\uff0c\u6240\u4f54\u7528\u7684\u5b58\u5132\u7a7a\u9593\u90fd\u662f\u56fa\u5b9a\u7684\u3002\u9019\u7a2e\u7279\u6027\u4f7f\u5f97FIXED\u5728\u67d0\u4e9b\u61c9\u7528\u5834\u666f\u4e2d\u975e\u5e38\u6709\u7528\u3002<\/p>\n<h3 id=\"%e5%ae%9a%e7%be%a9%e8%88%87%e8%aa%9e%e6%b3%95-QUzWAkFwAB\">\u5b9a\u7fa9\u8207\u8a9e\u6cd5<\/h3>\n<p>\u5728MySQL\u4e2d\uff0cFIXED\u6578\u64da\u985e\u578b\u7684\u5b9a\u7fa9\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE TABLE table_name (\n    column_name FIXED(M, D)\n);\n<\/code><\/pre>\n<p>\u5176\u4e2d\uff0cM\u8868\u793a\u6578\u5b57\u7684\u7e3d\u4f4d\u6578\uff0cD\u8868\u793a\u5c0f\u6578\u4f4d\u6578\u3002\u4f8b\u5982\uff0c<code>FIXED(5, 2)<\/code>\u8868\u793a\u9019\u500b\u6578\u64da\u985e\u578b\u53ef\u4ee5\u5b58\u5132\u7e3d\u51715\u4f4d\u6578\u5b57\uff0c\u5176\u4e2d2\u4f4d\u662f\u5c0f\u6578\u4f4d\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e5%a0%b4%e6%99%af-QUzWAkFwAB\">\u4f7f\u7528\u5834\u666f<\/h2>\n<p>FIXED\u6578\u64da\u985e\u578b\u9069\u5408\u7528\u65bc\u9700\u8981\u9ad8\u7cbe\u5ea6\u7684\u8a08\u7b97\u5834\u666f\uff0c\u4f8b\u5982\u91d1\u878d\u61c9\u7528\u3001\u6703\u8a08\u7cfb\u7d71\u7b49\u3002\u5728\u9019\u4e9b\u61c9\u7528\u4e2d\uff0c\u6578\u64da\u7684\u6e96\u78ba\u6027\u81f3\u95dc\u91cd\u8981\uff0c\u4f7f\u7528FIXED\u53ef\u4ee5\u907f\u514d\u6d6e\u9ede\u6578\u8a08\u7b97\u4e2d\u53ef\u80fd\u51fa\u73fe\u7684\u7cbe\u5ea6\u640d\u5931\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-QUzWAkFwAB\">\u793a\u4f8b<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528FIXED\u6578\u64da\u985e\u578b\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE transactions (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    amount FIXED(10, 2),\n    transaction_date DATETIME\n);\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c<code>amount<\/code>\u6b04\u4f4d\u4f7f\u7528\u4e86FIXED(10, 2)\u4f86\u5b58\u5132\u4ea4\u6613\u91d1\u984d\uff0c\u9019\u610f\u5473\u8457\u5b83\u53ef\u4ee5\u5b58\u5132\u6700\u591a8\u4f4d\u6574\u6578\u548c2\u4f4d\u5c0f\u6578\u7684\u91d1\u984d\u3002<\/p>\n<h2 id=\"%e5%84%aa%e7%bc%ba%e9%bb%9e%e5%88%86%e6%9e%90-QUzWAkFwAB\">\u512a\u7f3a\u9ede\u5206\u6790<\/h2>\n<h3 id=\"%e5%84%aa%e9%bb%9e-QUzWAkFwAB\">\u512a\u9ede<\/h3>\n<ul>\n<li><strong>\u9ad8\u7cbe\u5ea6\uff1a<\/strong>FIXED\u6578\u64da\u985e\u578b\u80fd\u5920\u63d0\u4f9b\u6bd4\u6d6e\u9ede\u6578\u66f4\u9ad8\u7684\u7cbe\u5ea6\uff0c\u9069\u5408\u9700\u8981\u7cbe\u78ba\u8a08\u7b97\u7684\u5834\u5408\u3002<\/li>\n<li><strong>\u56fa\u5b9a\u5b58\u5132\uff1a<\/strong>\u7531\u65bcFIXED\u7684\u5b58\u5132\u7a7a\u9593\u662f\u56fa\u5b9a\u7684\uff0c\u9019\u4f7f\u5f97\u6578\u64da\u7684\u8b80\u53d6\u548c\u5beb\u5165\u901f\u5ea6\u76f8\u5c0d\u8f03\u5feb\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%bc%ba%e9%bb%9e-QUzWAkFwAB\">\u7f3a\u9ede<\/h3>\n<ul>\n<li><strong>\u5b58\u5132\u7a7a\u9593\uff1a<\/strong>FIXED\u6578\u64da\u985e\u578b\u7684\u5b58\u5132\u7a7a\u9593\u662f\u56fa\u5b9a\u7684\uff0c\u9019\u53ef\u80fd\u5c0e\u81f4\u5728\u5b58\u5132\u5c0f\u6578\u64da\u6642\u6d6a\u8cbb\u7a7a\u9593\u3002<\/li>\n<li><strong>\u4e0d\u9748\u6d3b\uff1a<\/strong>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528FLOAT\u6216DOUBLE\u7b49\u6d6e\u9ede\u6578\u985e\u578b\u53ef\u80fd\u66f4\u70ba\u9748\u6d3b\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u8655\u7406\u5927\u7bc4\u570d\u6578\u64da\u6642\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-QUzWAkFwAB\">\u7d50\u8ad6<\/h2>\n<p>\u7e3d\u7684\u4f86\u8aaa\uff0cMySQL\u4e2d\u7684FIXED\u6578\u64da\u985e\u578b\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u9069\u5408\u7528\u65bc\u9700\u8981\u9ad8\u7cbe\u5ea6\u7684\u6578\u64da\u5b58\u5132\u548c\u8a08\u7b97\u5834\u666f\u3002\u96d6\u7136\u5b83\u6709\u5176\u512a\u7f3a\u9ede\uff0c\u4f46\u5728\u5408\u9069\u7684\u61c9\u7528\u4e2d\uff0cFIXED\u53ef\u4ee5\u63d0\u4f9b\u7a69\u5b9a\u548c\u6e96\u78ba\u7684\u6578\u64da\u8655\u7406\u80fd\u529b\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u60a8\u7684MySQL\u8cc7\u6599\u5eab\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\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\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u4e2d\u7684FIXED\uff08\u5b9a\u9ede\u6578\uff09\u6307\u4ee4\uff0c\u638c\u63e1\u5176\u7528\u6cd5\u53ca\u7279\u6027\uff0c\u63d0\u5347\u6578\u64da\u5eab\u7ba1\u7406\u8207\u6578\u64da\u7cbe\u78ba\u5ea6\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-78488","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78488","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=78488"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78488\/revisions"}],"predecessor-version":[{"id":78489,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78488\/revisions\/78489"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=78488"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=78488"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=78488"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}