{"id":158273,"date":"2024-11-03T00:57:18","date_gmt":"2024-11-02T16:57:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/158273\/"},"modified":"2024-11-03T00:57:19","modified_gmt":"2024-11-02T16:57:19","slug":"%e9%ab%98%e6%95%88%e5%af%a6%e7%94%a8%ef%bc%81%e5%a6%82%e4%bd%95%e6%8f%90%e5%8f%96%e9%9d%9e%e9%9b%b6%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9f%ef%bc%88%e6%8f%90%e5%8f%96%e9%9d%9e%e9%9b%b6%e6%95%b8%e6%93%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/158273\/","title":{"rendered":"\u9ad8\u6548\u5be6\u7528\uff01\u5982\u4f55\u63d0\u53d6\u975e\u96f6\u6578\u64da\u5eab\uff1f\uff08\u63d0\u53d6\u975e\u96f6\u6578\u64da\u5eab\uff09"},"content":{"rendered":"<h1 id=\"%e9%ab%98%e6%95%88%e5%af%a6%e7%94%a8%ef%bc%81%e5%a6%82%e4%bd%95%e6%8f%90%e5%8f%96%e9%9d%9e%e9%9b%b6%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9f%ef%bc%88%e6%8f%90%e5%8f%96%e9%9d%9e%e9%9b%b6%e6%95%b8%e6%93%9a-oJGldpNAzc\">\u9ad8\u6548\u5be6\u7528\uff01\u5982\u4f55\u63d0\u53d6\u975e\u96f6\u6578\u64da\u5eab\uff1f\uff08\u63d0\u53d6\u975e\u96f6\u6578\u64da\u5eab\uff09<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u63d0\u53d6\u975e\u96f6\u6578\u64da\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u70ba\u4e86\u6578\u64da\u5206\u6790\u3001\u5831\u544a\u751f\u6210\u9084\u662f\u7cfb\u7d71\u512a\u5316\uff0c\u80fd\u5920\u6709\u6548\u5730\u63d0\u53d6\u51fa\u975e\u96f6\u6578\u64da\u5c0d\u65bc\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728\u4e0d\u540c\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u4e2d\u63d0\u53d6\u975e\u96f6\u6578\u64da\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e9%9d%9e%e9%9b%b6%e6%95%b8%e6%93%9a%ef%bc%9f-oJGldpNAzc\">\u4ec0\u9ebc\u662f\u975e\u96f6\u6578\u64da\uff1f<\/h2>\n<p>\u975e\u96f6\u6578\u64da\u662f\u6307\u5728\u6578\u64da\u5eab\u4e2d\u4e0d\u7b49\u65bc\u96f6\u7684\u6578\u64da\u689d\u76ee\u3002\u9019\u4e9b\u6578\u64da\u901a\u5e38\u4ee3\u8868\u4e86\u6709\u6548\u7684\u8a18\u9304\uff0c\u5c0d\u65bc\u696d\u52d9\u5206\u6790\u548c\u6c7a\u7b56\u5236\u5b9a\u5177\u6709\u91cd\u8981\u610f\u7fa9\u3002\u4f8b\u5982\uff0c\u5728\u92b7\u552e\u6578\u64da\u4e2d\uff0c\u975e\u96f6\u7684\u92b7\u552e\u984d\u8868\u793a\u5be6\u969b\u7684\u4ea4\u6613\uff0c\u800c\u96f6\u5247\u53ef\u80fd\u8868\u793a\u6c92\u6709\u4ea4\u6613\u767c\u751f\u3002<\/p>\n<h2 id=\"%e6%8f%90%e5%8f%96%e9%9d%9e%e9%9b%b6%e6%95%b8%e6%93%9a%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%96%b9%e6%b3%95-oJGldpNAzc\">\u63d0\u53d6\u975e\u96f6\u6578\u64da\u7684\u57fa\u672c\u65b9\u6cd5<\/h2>\n<p>\u63d0\u53d6\u975e\u96f6\u6578\u64da\u7684\u57fa\u672c\u65b9\u6cd5\u901a\u5e38\u6d89\u53ca\u4f7f\u7528 SQL \u67e5\u8a62\u8a9e\u8a00\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u53ca\u5176\u63d0\u53d6\u975e\u96f6\u6578\u64da\u7684\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"1-mysql-oJGldpNAzc\">1. MySQL<\/h3>\n<pre><code>SELECT * FROM sales WHERE amount &gt; 0;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5f9e\u540d\u70ba <code>sales<\/code> \u7684\u8868\u4e2d\u9078\u64c7\u6240\u6709\u92b7\u552e\u984d\u5927\u65bc\u96f6\u7684\u8a18\u9304\u3002<\/p>\n<h3 id=\"2-postgresql-oJGldpNAzc\">2. PostgreSQL<\/h3>\n<pre><code>SELECT * FROM orders WHERE quantity &gt; 0;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5f9e <code>orders<\/code> \u8868\u4e2d\u63d0\u53d6\u6240\u6709\u6578\u91cf\u5927\u65bc\u96f6\u7684\u8a02\u55ae\u3002<\/p>\n<h3 id=\"3-sql-server-oJGldpNAzc\">3. SQL Server<\/h3>\n<pre><code>SELECT * FROM inventory WHERE stock &gt; 0;<\/code><\/pre>\n<p>\u5728 SQL Server \u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u9019\u689d\u67e5\u8a62\u4f86\u7372\u53d6\u6240\u6709\u5eab\u5b58\u5927\u65bc\u96f6\u7684\u5546\u54c1\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e8%81%9a%e5%90%88%e5%87%bd%e6%95%b8%e6%8f%90%e5%8f%96%e9%9d%9e%e9%9b%b6%e6%95%b8%e6%93%9a-oJGldpNAzc\">\u4f7f\u7528\u805a\u5408\u51fd\u6578\u63d0\u53d6\u975e\u96f6\u6578\u64da<\/h2>\n<p>\u9664\u4e86\u57fa\u672c\u7684\u67e5\u8a62\uff0c\u805a\u5408\u51fd\u6578\u4e5f\u53ef\u4ee5\u7528\u4f86\u63d0\u53d6\u975e\u96f6\u6578\u64da\u3002\u4f8b\u5982\uff0c\u6211\u5011\u53ef\u4ee5\u8a08\u7b97\u975e\u96f6\u6578\u64da\u7684\u7e3d\u548c\u6216\u5e73\u5747\u503c\uff1a<\/p>\n<h3 id=\"mysql-%e7%a4%ba%e4%be%8b-oJGldpNAzc\">MySQL \u793a\u4f8b<\/h3>\n<pre><code>SELECT SUM(amount) AS total_sales FROM sales WHERE amount &gt; 0;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u8a08\u7b97\u6240\u6709\u975e\u96f6\u92b7\u552e\u984d\u7684\u7e3d\u548c\u3002<\/p>\n<h3 id=\"postgresql-%e7%a4%ba%e4%be%8b-oJGldpNAzc\">PostgreSQL \u793a\u4f8b<\/h3>\n<pre><code>SELECT AVG(price) AS average_price FROM products WHERE price &gt; 0;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u8a08\u7b97\u6240\u6709\u975e\u96f6\u7522\u54c1\u50f9\u683c\u7684\u5e73\u5747\u503c\u3002<\/p>\n<h2 id=\"%e5%84%aa%e5%8c%96%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd-oJGldpNAzc\">\u512a\u5316\u67e5\u8a62\u6027\u80fd<\/h2>\n<p>\u5728\u63d0\u53d6\u975e\u96f6\u6578\u64da\u6642\uff0c\u67e5\u8a62\u6027\u80fd\u662f\u9700\u8981\u8003\u616e\u7684\u91cd\u8981\u56e0\u7d20\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u512a\u5316\u67e5\u8a62\u6027\u80fd\u7684\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u7d22\u5f15\uff1a<\/strong>\u70ba\u6d89\u53ca\u975e\u96f6\u689d\u4ef6\u7684\u5217\u5275\u5efa\u7d22\u5f15\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\u3002<\/li>\n<li><strong>\u907f\u514d SELECT *\uff1a<\/strong>\u50c5\u9078\u64c7\u9700\u8981\u7684\u5217\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u6578\u64da\u50b3\u8f38\u91cf\u3002<\/li>\n<li><strong>\u5b9a\u671f\u6e05\u7406\u6578\u64da\uff1a<\/strong>\u522a\u9664\u4e0d\u5fc5\u8981\u7684\u96f6\u6578\u64da\uff0c\u4fdd\u6301\u6578\u64da\u5eab\u7684\u6574\u6f54\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-oJGldpNAzc\">\u7d50\u8ad6<\/h2>\n<p>\u63d0\u53d6\u975e\u96f6\u6578\u64da\u662f\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u7684\u4e00\u500b\u91cd\u8981\u4efb\u52d9\uff0c\u901a\u904e\u4f7f\u7528\u9069\u7576\u7684 SQL \u67e5\u8a62\u548c\u512a\u5316\u6280\u8853\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u6548\u7387\u3002\u7121\u8ad6\u60a8\u4f7f\u7528\u7684\u662f MySQL\u3001PostgreSQL \u9084\u662f SQL Server\uff0c\u638c\u63e1\u9019\u4e9b\u57fa\u672c\u6280\u5de7\u90fd\u80fd\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7ba1\u7406\u548c\u5206\u6790\u6578\u64da\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\u9700\u6c42\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u548c\u64f4\u5c55\u60a8\u7684\u696d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u9ad8\u6548\u63d0\u53d6\u975e\u96f6\u6578\u64da\u5eab\u7684\u65b9\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u5be6\u73fe\u7cbe\u6e96\u5206\u6790\u8207\u61c9\u7528\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-158273","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/158273","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=158273"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/158273\/revisions"}],"predecessor-version":[{"id":158274,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/158273\/revisions\/158274"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=158273"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=158273"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=158273"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}