{"id":76760,"date":"2024-10-16T09:40:16","date_gmt":"2024-10-16T01:40:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76760\/"},"modified":"2024-10-16T09:40:17","modified_gmt":"2024-10-16T01:40:17","slug":"mysql%e6%95%b8%e5%ad%b8%e5%87%bd%e6%95%b8%e7%9a%84%e5%af%a6%e9%9a%9b%e7%94%a8%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76760\/","title":{"rendered":"MySQL\u6578\u5b78\u51fd\u6578\u7684\u5be6\u969b\u7528\u6cd5"},"content":{"rendered":"<h1 id=\"mysql%e6%95%b8%e5%ad%b8%e5%87%bd%e6%95%b8%e7%9a%84%e5%af%a6%e9%9a%9b%e7%94%a8%e6%b3%95-NefrxKVYTc\">MySQL\u6578\u5b78\u51fd\u6578\u7684\u5be6\u969b\u7528\u6cd5<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u958b\u6e90\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u5b78\u51fd\u6578\u4f86\u652f\u6301\u6578\u64da\u7684\u8a08\u7b97\u548c\u5206\u6790\u3002\u9019\u4e9b\u6578\u5b78\u51fd\u6578\u4e0d\u50c5\u80fd\u5920\u7c21\u5316\u6578\u64da\u8655\u7406\u7684\u904e\u7a0b\uff0c\u9084\u80fd\u63d0\u9ad8\u67e5\u8a62\u7684\u6548\u7387\u3002\u672c\u6587\u5c07\u63a2\u8a0eMySQL\u4e2d\u7684\u6578\u5b78\u51fd\u6578\u53ca\u5176\u5be6\u969b\u7528\u6cd5\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u5728\u65e5\u5e38\u7684\u6578\u64da\u64cd\u4f5c\u4e2d\u61c9\u7528\u9019\u4e9b\u51fd\u6578\u3002<\/p>\n<h2 id=\"mysql%e6%95%b8%e5%ad%b8%e5%87%bd%e6%95%b8%e6%a6%82%e8%bf%b0-NefrxKVYTc\">MySQL\u6578\u5b78\u51fd\u6578\u6982\u8ff0<\/h2>\n<p>MySQL\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u5b78\u51fd\u6578\uff0c\u4e3b\u8981\u53ef\u4ee5\u5206\u70ba\u4ee5\u4e0b\u5e7e\u985e\uff1a<\/p>\n<ul>\n<li><strong>\u57fa\u672c\u6578\u5b78\u51fd\u6578\uff1a<\/strong>\u5982\u52a0\u6cd5\u3001\u6e1b\u6cd5\u3001\u4e58\u6cd5\u548c\u9664\u6cd5\u7b49\u3002<\/li>\n<li><strong>\u4e09\u89d2\u51fd\u6578\uff1a<\/strong>\u5982SIN\u3001COS\u3001TAN\u7b49\u3002<\/li>\n<li><strong>\u6307\u6578\u548c\u5c0d\u6578\u51fd\u6578\uff1a<\/strong>\u5982EXP\u3001LOG\u3001LOG10\u7b49\u3002<\/li>\n<li><strong>\u53d6\u6574\u51fd\u6578\uff1a<\/strong>\u5982FLOOR\u3001CEIL\u3001ROUND\u7b49\u3002<\/li>\n<li><strong>\u96a8\u6a5f\u6578\u51fd\u6578\uff1a<\/strong>\u5982RAND()\u7b49\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%9f%ba%e6%9c%ac%e6%95%b8%e5%ad%b8%e5%87%bd%e6%95%b8%e7%9a%84%e4%bd%bf%e7%94%a8-NefrxKVYTc\">\u57fa\u672c\u6578\u5b78\u51fd\u6578\u7684\u4f7f\u7528<\/h2>\n<p>\u57fa\u672c\u6578\u5b78\u51fd\u6578\u5728\u6578\u64da\u67e5\u8a62\u4e2d\u975e\u5e38\u5e38\u898b\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u57fa\u672c\u6578\u5b78\u51fd\u6578\u53ca\u5176\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"%e5%8a%a0%e6%b3%95%e5%92%8c%e6%b8%9b%e6%b3%95-NefrxKVYTc\">\u52a0\u6cd5\u548c\u6e1b\u6cd5<\/h3>\n<pre><code>SELECT 10 + 5 AS \u52a0\u6cd5\u7d50\u679c, 10 - 5 AS \u6e1b\u6cd5\u7d50\u679c;<\/code><\/pre>\n<p>\u9019\u6bb5\u67e5\u8a62\u5c07\u8fd4\u56de\u52a0\u6cd5\u548c\u6e1b\u6cd5\u7684\u7d50\u679c\uff0c\u5206\u5225\u70ba15\u548c5\u3002<\/p>\n<h3 id=\"%e4%b9%98%e6%b3%95%e5%92%8c%e9%99%a4%e6%b3%95-NefrxKVYTc\">\u4e58\u6cd5\u548c\u9664\u6cd5<\/h3>\n<pre><code>SELECT 10 * 5 AS \u4e58\u6cd5\u7d50\u679c, 10 \/ 5 AS \u9664\u6cd5\u7d50\u679c;<\/code><\/pre>\n<p>\u9019\u6bb5\u67e5\u8a62\u5c07\u8fd4\u56de\u4e58\u6cd5\u548c\u9664\u6cd5\u7684\u7d50\u679c\uff0c\u5206\u5225\u70ba50\u548c2\u3002<\/p>\n<h2 id=\"%e4%b8%89%e8%a7%92%e5%87%bd%e6%95%b8%e7%9a%84%e6%87%89%e7%94%a8-NefrxKVYTc\">\u4e09\u89d2\u51fd\u6578\u7684\u61c9\u7528<\/h2>\n<p>\u4e09\u89d2\u51fd\u6578\u5728\u8655\u7406\u8207\u89d2\u5ea6\u76f8\u95dc\u7684\u8a08\u7b97\u6642\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff0c\u8a08\u7b97\u4e00\u500b\u89d2\u5ea6\u7684\u6b63\u5f26\u503c\uff1a<\/p>\n<pre><code>SELECT SIN(RADIANS(30)) AS \u6b63\u5f26\u503c;<\/code><\/pre>\n<p>\u9019\u6bb5\u67e5\u8a62\u5c07\u8fd4\u56de30\u5ea6\u7684\u6b63\u5f26\u503c\uff0c\u53730.5\u3002<\/p>\n<h2 id=\"%e6%8c%87%e6%95%b8%e5%92%8c%e5%b0%8d%e6%95%b8%e5%87%bd%e6%95%b8-NefrxKVYTc\">\u6307\u6578\u548c\u5c0d\u6578\u51fd\u6578<\/h2>\n<p>\u6307\u6578\u548c\u5c0d\u6578\u51fd\u6578\u5728\u6578\u64da\u5206\u6790\u4e2d\u7d93\u5e38\u88ab\u4f7f\u7528\uff0c\u7279\u5225\u662f\u5728\u7d71\u8a08\u5b78\u548c\u91d1\u878d\u8a08\u7b97\u4e2d\u3002\u4f8b\u5982\uff0c\u8a08\u7b97\u81ea\u7136\u5c0d\u6578\uff1a<\/p>\n<pre><code>SELECT LOG(10) AS \u81ea\u7136\u5c0d\u6578;<\/code><\/pre>\n<p>\u9019\u6bb5\u67e5\u8a62\u5c07\u8fd4\u56de10\u7684\u81ea\u7136\u5c0d\u6578\u503c\u3002<\/p>\n<h2 id=\"%e5%8f%96%e6%95%b4%e5%87%bd%e6%95%b8%e7%9a%84%e4%bd%bf%e7%94%a8-NefrxKVYTc\">\u53d6\u6574\u51fd\u6578\u7684\u4f7f\u7528<\/h2>\n<p>\u53d6\u6574\u51fd\u6578\u5728\u9700\u8981\u5c07\u6578\u5b57\u56db\u6368\u4e94\u5165\u6216\u53d6\u6574\u6642\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff0c\u4f7f\u7528ROUND\u51fd\u6578\u4f86\u56db\u6368\u4e94\u5165\uff1a<\/p>\n<pre><code>SELECT ROUND(10.567, 2) AS \u56db\u6368\u4e94\u5165\u7d50\u679c;<\/code><\/pre>\n<p>\u9019\u6bb5\u67e5\u8a62\u5c07\u8fd4\u56de10.57\uff0c\u56e0\u70ba\u5b83\u5c07\u6578\u5b57\u56db\u6368\u4e94\u5165\u5230\u5c0f\u6578\u9ede\u5f8c\u5169\u4f4d\u3002<\/p>\n<h2 id=\"%e9%9a%a8%e6%a9%9f%e6%95%b8%e7%9a%84%e7%94%9f%e6%88%90-NefrxKVYTc\">\u96a8\u6a5f\u6578\u7684\u751f\u6210<\/h2>\n<p>\u96a8\u6a5f\u6578\u51fd\u6578\u5728\u9700\u8981\u751f\u6210\u96a8\u6a5f\u6578\u64da\u6642\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff0c\u751f\u6210\u4e00\u500b0\u52301\u4e4b\u9593\u7684\u96a8\u6a5f\u6578\uff1a<\/p>\n<pre><code>SELECT RAND() AS \u96a8\u6a5f\u6578;<\/code><\/pre>\n<p>\u9019\u6bb5\u67e5\u8a62\u5c07\u8fd4\u56de\u4e00\u500b\u96a8\u6a5f\u751f\u6210\u7684\u6578\u5b57\uff0c\u7bc4\u570d\u57280\u52301\u4e4b\u9593\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-NefrxKVYTc\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u7684\u6578\u5b78\u51fd\u6578\u70ba\u6578\u64da\u8655\u7406\u548c\u5206\u6790\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u652f\u6301\u3002\u7121\u8ad6\u662f\u9032\u884c\u57fa\u672c\u7684\u7b97\u8853\u904b\u7b97\uff0c\u9084\u662f\u8655\u7406\u66f4\u8907\u96dc\u7684\u6578\u5b78\u8a08\u7b97\uff0c\u9019\u4e9b\u51fd\u6578\u90fd\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u63d0\u9ad8\u6548\u7387\u548c\u6e96\u78ba\u6027\u3002\u4e86\u89e3\u9019\u4e9b\u51fd\u6578\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u80fd\u5920\u4f7f\u958b\u767c\u8005\u5728\u65e5\u5e38\u5de5\u4f5c\u4e2d\u66f4\u52a0\u5f97\u5fc3\u61c9\u624b\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\u7528\u6236\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>\u63a2\u7d22MySQL\u6578\u5b78\u51fd\u6578\u7684\u5be6\u969b\u7528\u6cd5\uff0c\u4e86\u89e3\u5982\u4f55\u5728\u6578\u64da\u5eab\u67e5\u8a62\u4e2d\u61c9\u7528\u6578\u5b78\u904b\u7b97\u4ee5\u63d0\u5347\u6578\u64da\u5206\u6790\u6548\u7387\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-76760","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76760","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=76760"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76760\/revisions"}],"predecessor-version":[{"id":76761,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76760\/revisions\/76761"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76760"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76760"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76760"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}