{"id":160301,"date":"2024-11-03T21:57:18","date_gmt":"2024-11-03T13:57:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160301\/"},"modified":"2024-11-03T21:57:19","modified_gmt":"2024-11-03T13:57:19","slug":"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-%e6%af%94%e8%bc%83%e9%81%8b%e7%ae%97%e7%ac%a6","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160301\/","title":{"rendered":"OceanBase \u6559\u7a0b\uff1aOceanBase \u6bd4\u8f03\u904b\u7b97\u7b26"},"content":{"rendered":"<h1 id=\"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-%e6%af%94%e8%bc%83%e9%81%8b%e7%ae%97%e7%ac%a6-RmOxASoJQV\">OceanBase \u6559\u7a0b\uff1aOceanBase \u6bd4\u8f03\u904b\u7b97\u7b26<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cOceanBase \u4f5c\u70ba\u4e00\u500b\u9ad8\u6027\u80fd\u7684\u5206\u4f48\u5f0f\u6578\u64da\u5eab\uff0c\u8d8a\u4f86\u8d8a\u53d7\u5230\u958b\u767c\u8005\u548c\u4f01\u696d\u7684\u9752\u775e\u3002\u5b83\u4e0d\u50c5\u652f\u6301\u9ad8\u4e26\u767c\u7684\u8b80\u5beb\u64cd\u4f5c\uff0c\u9084\u5177\u5099\u5f37\u5927\u7684\u64f4\u5c55\u6027\u548c\u9ad8\u53ef\u7528\u6027\u3002\u5728\u9019\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u5011\u5c07\u6df1\u5165\u63a2\u8a0e OceanBase \u4e2d\u7684\u6bd4\u8f03\u904b\u7b97\u7b26\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u9019\u4e9b\u904b\u7b97\u7b26\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%af%94%e8%bc%83%e9%81%8b%e7%ae%97%e7%ac%a6%ef%bc%9f-RmOxASoJQV\">\u4ec0\u9ebc\u662f\u6bd4\u8f03\u904b\u7b97\u7b26\uff1f<\/h2>\n<p>\u6bd4\u8f03\u904b\u7b97\u7b26\u662f\u7528\u65bc\u6bd4\u8f03\u5169\u500b\u503c\u7684\u904b\u7b97\u7b26\uff0c\u901a\u5e38\u7528\u65bc SQL \u67e5\u8a62\u7684 WHERE \u5b50\u53e5\u4e2d\u3002\u9019\u4e9b\u904b\u7b97\u7b26\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u7be9\u9078\u51fa\u7b26\u5408\u7279\u5b9a\u689d\u4ef6\u7684\u6578\u64da\u3002OceanBase \u652f\u6301\u591a\u7a2e\u6bd4\u8f03\u904b\u7b97\u7b26\uff0c\u4e3b\u8981\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>=<\/code>\uff1a\u7b49\u65bc<\/li>\n<li><code>!=<\/code> \u6216 <code><\/code>\uff1a\u4e0d\u7b49\u65bc<\/li>\n<li><code>&gt;<\/code>\uff1a\u5927\u65bc<\/li>\n<li><code>&gt;=<\/code>\uff1a\u5927\u65bc\u7b49\u65bc<\/li>\n<li><code>&lt;<\/code>\uff1a\u5c0f\u65bc<\/li>\n<li><code>&lt;=<\/code>\uff1a\u5c0f\u65bc\u7b49\u65bc<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e6%af%94%e8%bc%83%e9%81%8b%e7%ae%97%e7%ac%a6%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-RmOxASoJQV\">\u4f7f\u7528\u6bd4\u8f03\u904b\u7b97\u7b26\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728 OceanBase \u4e2d\uff0c\u4f7f\u7528\u6bd4\u8f03\u904b\u7b97\u7b26\u7684\u57fa\u672c\u8a9e\u6cd5\u8207\u6a19\u6e96 SQL \u8a9e\u6cd5\u76f8\u540c\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u67e5\u8a62\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT * FROM employees WHERE salary &gt; 50000;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u85aa\u6c34\u5927\u65bc 50000 \u7684\u54e1\u5de5\u8a18\u9304\u3002<\/p>\n<h2 id=\"%e6%af%94%e8%bc%83%e9%81%8b%e7%ae%97%e7%ac%a6%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8-RmOxASoJQV\">\u6bd4\u8f03\u904b\u7b97\u7b26\u7684\u5be6\u969b\u61c9\u7528<\/h2>\n<p>\u6bd4\u8f03\u904b\u7b97\u7b26\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u975e\u5e38\u91cd\u8981\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u4f7f\u7528\u5834\u666f\uff1a<\/p>\n<h3 id=\"1-%e7%af%a9%e9%81%b8%e6%95%b8%e6%93%9a-RmOxASoJQV\">1. \u7be9\u9078\u6578\u64da<\/h3>\n<p>\u901a\u904e\u6bd4\u8f03\u904b\u7b97\u7b26\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u7be9\u9078\u51fa\u7b26\u5408\u7279\u5b9a\u689d\u4ef6\u7684\u6578\u64da\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u60f3\u67e5\u8a62\u6240\u6709\u5e74\u9f61\u5927\u65bc 30 \u6b72\u7684\u5ba2\u6236\uff1a<\/p>\n<pre><code>SELECT * FROM customers WHERE age &gt; 30;<\/code><\/pre>\n<h3 id=\"2-%e6%8e%92%e5%ba%8f%e6%95%b8%e6%93%9a-RmOxASoJQV\">2. \u6392\u5e8f\u6578\u64da<\/h3>\n<p>\u96d6\u7136\u6392\u5e8f\u4e3b\u8981\u4f7f\u7528 <code>ORDER BY<\/code> \u5b50\u53e5\uff0c\u4f46\u6bd4\u8f03\u904b\u7b97\u7b26\u4e5f\u53ef\u4ee5\u5728\u6392\u5e8f\u904e\u7a0b\u4e2d\u767c\u63ee\u4f5c\u7528\u3002\u4f8b\u5982\uff0c\u6211\u5011\u53ef\u4ee5\u67e5\u8a62\u6240\u6709\u7522\u54c1\u4e26\u6309\u50f9\u683c\u5f9e\u9ad8\u5230\u4f4e\u6392\u5e8f\uff1a<\/p>\n<pre><code>SELECT * FROM products ORDER BY price DESC;<\/code><\/pre>\n<h3 id=\"3-%e7%b5%84%e5%90%88%e6%a2%9d%e4%bb%b6%e6%9f%a5%e8%a9%a2-RmOxASoJQV\">3. \u7d44\u5408\u689d\u4ef6\u67e5\u8a62<\/h3>\n<p>\u5728\u8907\u96dc\u7684\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u591a\u500b\u6bd4\u8f03\u904b\u7b97\u7b26\u4f86\u7d44\u5408\u689d\u4ef6\u3002\u4f8b\u5982\uff0c\u67e5\u8a62\u5e74\u9f61\u5728 20 \u5230 30 \u6b72\u4e4b\u9593\u7684\u5ba2\u6236\uff1a<\/p>\n<pre><code>SELECT * FROM customers WHERE age &gt;= 20 AND age &lt;= 30;<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-RmOxASoJQV\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528\u6bd4\u8f03\u904b\u7b97\u7b26\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u6578\u64da\u985e\u578b\u5339\u914d\uff1a\u5728\u9032\u884c\u6bd4\u8f03\u6642\uff0c\u78ba\u4fdd\u5169\u500b\u6bd4\u8f03\u7684\u503c\u985e\u578b\u76f8\u540c\uff0c\u5426\u5247\u53ef\u80fd\u6703\u5c0e\u81f4\u932f\u8aa4\u6216\u4e0d\u6b63\u78ba\u7684\u7d50\u679c\u3002<\/li>\n<li>NULL \u503c\u7684\u8655\u7406\uff1a\u5728 OceanBase \u4e2d\uff0cNULL \u503c\u7684\u6bd4\u8f03\u9700\u8981\u7279\u5225\u6ce8\u610f\uff0c\u4f7f\u7528 <code>IS NULL<\/code> \u6216 <code>IS NOT NULL<\/code> \u4f86\u8655\u7406\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-RmOxASoJQV\">\u7e3d\u7d50<\/h2>\n<p>OceanBase \u7684\u6bd4\u8f03\u904b\u7b97\u7b26\u70ba\u6578\u64da\u67e5\u8a62\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u9748\u6d3b\u6027\u548c\u4fbf\u5229\u6027\u3002\u901a\u904e\u6b63\u78ba\u4f7f\u7528\u9019\u4e9b\u904b\u7b97\u7b26\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u9ad8\u6548\u5730\u7be9\u9078\u548c\u64cd\u4f5c\u6578\u64da\uff0c\u5f9e\u800c\u63d0\u5347\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u7528\u6236\u9ad4\u9a57\u3002\u82e5\u60a8\u5c0d\u65bc\u5982\u4f55\u5728 OceanBase \u4e2d\u9032\u884c\u66f4\u6df1\u5165\u7684\u5b78\u7fd2\u6216\u9700\u8981\u76f8\u95dc\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 OceanBase \u6559\u7a0b\u4e2d\u7684\u6bd4\u8f03\u904b\u7b97\u7b26\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u4f7f\u7528\u9019\u4e9b\u904b\u7b97\u7b26\u9032\u884c\u6578\u64da\u67e5\u8a62\u548c\u64cd\u4f5c\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-160301","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160301","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=160301"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160301\/revisions"}],"predecessor-version":[{"id":160302,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160301\/revisions\/160302"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160301"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160301"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160301"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}