{"id":186710,"date":"2024-11-11T08:11:24","date_gmt":"2024-11-11T00:11:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/186710\/"},"modified":"2024-11-11T08:11:25","modified_gmt":"2024-11-11T00:11:25","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%88%e7%ae%97%e5%af%a6%e7%8f%be%e6%8c%87%e5%8d%97-%e6%80%8e%e6%a8%a3%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e5%af%a6%e7%8f%be%e8%a8%88%e7%ae%97","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/186710\/","title":{"rendered":"\u6578\u64da\u5eab\u8a08\u7b97\u5be6\u73fe\u6307\u5357 (\u600e\u6a23\u5728\u6578\u64da\u5eab\u4e2d\u5be6\u73fe\u8a08\u7b97)"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%88%e7%ae%97%e5%af%a6%e7%8f%be%e6%8c%87%e5%8d%97-%e6%80%8e%e6%a8%a3%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e5%af%a6%e7%8f%be%e8%a8%88%e7%ae%97-ySUlkzeuhH\">\u6578\u64da\u5eab\u8a08\u7b97\u5be6\u73fe\u6307\u5357 (\u600e\u6a23\u5728\u6578\u64da\u5eab\u4e2d\u5be6\u73fe\u8a08\u7b97)<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u4e0d\u50c5\u50c5\u662f\u5b58\u5132\u6578\u64da\u7684\u5730\u65b9\uff0c\u5b83\u5011\u9084\u53ef\u4ee5\u9032\u884c\u5404\u7a2e\u8a08\u7b97\u548c\u6578\u64da\u8655\u7406\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u5be6\u73fe\u8a08\u7b97\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u9019\u4e00\u904e\u7a0b\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%88%e7%ae%97%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-ySUlkzeuhH\">\u6578\u64da\u5eab\u8a08\u7b97\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u6578\u64da\u5eab\u8a08\u7b97\u662f\u6307\u5728\u6578\u64da\u5eab\u7cfb\u7d71\u4e2d\u57f7\u884c\u7684\u6578\u5b78\u904b\u7b97\u548c\u908f\u8f2f\u64cd\u4f5c\u3002\u9019\u4e9b\u8a08\u7b97\u53ef\u4ee5\u5728\u67e5\u8a62\u904e\u7a0b\u4e2d\u9032\u884c\uff0c\u901a\u5e38\u4f7f\u7528 SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u4f86\u5be6\u73fe\u3002\u6578\u64da\u5eab\u8a08\u7b97\u7684\u4e3b\u8981\u76ee\u7684\u662f\u5f9e\u5b58\u5132\u7684\u6578\u64da\u4e2d\u63d0\u53d6\u6709\u7528\u7684\u4fe1\u606f\uff0c\u9032\u800c\u652f\u6301\u696d\u52d9\u6c7a\u7b56\u3002<\/p>\n<h2 id=\"%e5%b8%b8%e8%a6%8b%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%88%e7%ae%97%e9%a1%9e%e5%9e%8b-ySUlkzeuhH\">\u5e38\u898b\u7684\u6578\u64da\u5eab\u8a08\u7b97\u985e\u578b<\/h2>\n<ul>\n<li><strong>\u805a\u5408\u8a08\u7b97\uff1a<\/strong>\u9019\u985e\u8a08\u7b97\u901a\u5e38\u7528\u65bc\u7d71\u8a08\u6578\u64da\uff0c\u4f8b\u5982\u8a08\u7b97\u7e3d\u548c\u3001\u5e73\u5747\u503c\u3001\u6700\u5927\u503c\u548c\u6700\u5c0f\u503c\u7b49\u3002<\/li>\n<li><strong>\u6578\u5b78\u904b\u7b97\uff1a<\/strong>\u53ef\u4ee5\u5728\u67e5\u8a62\u4e2d\u76f4\u63a5\u9032\u884c\u52a0\u3001\u6e1b\u3001\u4e58\u3001\u9664\u7b49\u57fa\u672c\u6578\u5b78\u904b\u7b97\u3002<\/li>\n<li><strong>\u689d\u4ef6\u8a08\u7b97\uff1a<\/strong>\u4f7f\u7528 CASE \u8a9e\u53e5\u4f86\u6839\u64da\u7279\u5b9a\u689d\u4ef6\u9032\u884c\u8a08\u7b97\u3002<\/li>\n<li><strong>\u65e5\u671f\u548c\u6642\u9593\u8a08\u7b97\uff1a<\/strong>\u5c0d\u65e5\u671f\u548c\u6642\u9593\u9032\u884c\u52a0\u6e1b\u904b\u7b97\uff0c\u4ee5\u7372\u53d6\u6240\u9700\u7684\u6642\u9593\u7bc4\u570d\u6216\u6301\u7e8c\u6642\u9593\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%9c%a8-sql-%e4%b8%ad%e5%af%a6%e7%8f%be%e8%a8%88%e7%ae%97-ySUlkzeuhH\">\u5728 SQL \u4e2d\u5be6\u73fe\u8a08\u7b97<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5728 SQL \u4e2d\u5be6\u73fe\u8a08\u7b97\u7684\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"1-%e8%81%9a%e5%90%88%e8%a8%88%e7%ae%97%e7%a4%ba%e4%be%8b-ySUlkzeuhH\">1. \u805a\u5408\u8a08\u7b97\u793a\u4f8b<\/h3>\n<pre><code>SELECT \n    COUNT(*) AS \u7e3d\u6578, \n    AVG(\u50f9\u683c) AS \u5e73\u5747\u50f9\u683c \nFROM \n    \u7522\u54c1;<\/code><\/pre>\n<p>\u4e0a\u8ff0\u67e5\u8a62\u5c07\u8fd4\u56de\u7522\u54c1\u8868\u4e2d\u7684\u7e3d\u6578\u548c\u5e73\u5747\u50f9\u683c\u3002<\/p>\n<h3 id=\"2-%e6%95%b8%e5%ad%b8%e9%81%8b%e7%ae%97%e7%a4%ba%e4%be%8b-ySUlkzeuhH\">2. \u6578\u5b78\u904b\u7b97\u793a\u4f8b<\/h3>\n<pre><code>SELECT \n    \u540d\u7a31, \n    \u50f9\u683c, \n    \u50f9\u683c * 0.9 AS \u6298\u6263\u5f8c\u50f9\u683c \nFROM \n    \u7522\u54c1;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8a08\u7b97\u6bcf\u500b\u7522\u54c1\u7684\u6298\u6263\u5f8c\u50f9\u683c\uff0c\u5047\u8a2d\u6298\u6263\u70ba 10%\u3002<\/p>\n<h3 id=\"3-%e6%a2%9d%e4%bb%b6%e8%a8%88%e7%ae%97%e7%a4%ba%e4%be%8b-ySUlkzeuhH\">3. \u689d\u4ef6\u8a08\u7b97\u793a\u4f8b<\/h3>\n<pre><code>SELECT \n    \u540d\u7a31, \n    CASE \n        WHEN \u50f9\u683c &gt; 100 THEN '\u9ad8\u50f9' \n        ELSE '\u4f4e\u50f9' \n    END AS \u50f9\u683c\u985e\u5225 \nFROM \n    \u7522\u54c1;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u6839\u64da\u7522\u54c1\u7684\u50f9\u683c\u5c07\u5176\u5206\u985e\u70ba\u201c\u9ad8\u50f9\u201d\u6216\u201c\u4f4e\u50f9\u201d\u3002<\/p>\n<h3 id=\"4-%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93%e8%a8%88%e7%ae%97%e7%a4%ba%e4%be%8b-ySUlkzeuhH\">4. \u65e5\u671f\u548c\u6642\u9593\u8a08\u7b97\u793a\u4f8b<\/h3>\n<pre><code>SELECT \n    \u8a02\u55ae\u7de8\u865f, \n    \u8a02\u55ae\u65e5\u671f, \n    DATE_ADD(\u8a02\u55ae\u65e5\u671f, INTERVAL 7 DAY) AS \u5230\u671f\u65e5\u671f \nFROM \n    \u8a02\u55ae;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8a08\u7b97\u6bcf\u500b\u8a02\u55ae\u7684\u5230\u671f\u65e5\u671f\uff0c\u5047\u8a2d\u5230\u671f\u6642\u9593\u70ba\u8a02\u55ae\u65e5\u671f\u5f8c\u7684 7 \u5929\u3002<\/p>\n<h2 id=\"%e6%80%a7%e8%83%bd%e8%80%83%e9%87%8f-ySUlkzeuhH\">\u6027\u80fd\u8003\u91cf<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\u9032\u884c\u8a08\u7b97\u6642\uff0c\u6027\u80fd\u662f\u4e00\u500b\u91cd\u8981\u7684\u8003\u91cf\u56e0\u7d20\u3002\u904e\u65bc\u8907\u96dc\u7684\u8a08\u7b97\u53ef\u80fd\u6703\u5c0e\u81f4\u67e5\u8a62\u901f\u5ea6\u8b8a\u6162\uff0c\u56e0\u6b64\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u548c\u67e5\u8a62\u6642\uff0c\u61c9\u8003\u616e\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u76e1\u91cf\u4f7f\u7528\u7d22\u5f15\u4f86\u52a0\u901f\u67e5\u8a62\u3002<\/li>\n<li>\u907f\u514d\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u904e\u591a\u7684\u5b50\u67e5\u8a62\u3002<\/li>\n<li>\u5b9a\u671f\u512a\u5316\u6578\u64da\u5eab\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-ySUlkzeuhH\">\u7d50\u8ad6<\/h2>\n<p>\u6578\u64da\u5eab\u8a08\u7b97\u662f\u6578\u64da\u5206\u6790\u548c\u696d\u52d9\u6c7a\u7b56\u7684\u91cd\u8981\u7d44\u6210\u90e8\u5206\u3002\u901a\u904e\u4f7f\u7528 SQL \u9032\u884c\u5404\u7a2e\u8a08\u7b97\uff0c\u4f01\u696d\u53ef\u4ee5\u5f9e\u6578\u64da\u4e2d\u63d0\u53d6\u6709\u50f9\u503c\u7684\u4fe1\u606f\uff0c\u5f9e\u800c\u652f\u6301\u5176\u696d\u52d9\u904b\u71df\u3002\u4e86\u89e3\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u5be6\u73fe\u8a08\u7b97\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u6548\u7387\u548c\u6e96\u78ba\u6027\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\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u8a08\u7b97\u9700\u6c42\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u696d\u52d9\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\u7d22\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u5be6\u73fe\u8a08\u7b97\u7684\u5168\u9762\u6307\u5357\uff0c\u6db5\u84cb\u6700\u4f73\u5be6\u8e10\u3001\u6280\u8853\u548c\u793a\u4f8b\uff0c\u52a9\u60a8\u63d0\u5347\u6578\u64da\u8655\u7406\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-186710","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186710","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=186710"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186710\/revisions"}],"predecessor-version":[{"id":186711,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186710\/revisions\/186711"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=186710"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=186710"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=186710"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}