{"id":160245,"date":"2024-11-03T21:29:24","date_gmt":"2024-11-03T13:29:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160245\/"},"modified":"2024-11-03T21:29:25","modified_gmt":"2024-11-03T13:29:25","slug":"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-sql-%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160245\/","title":{"rendered":"OceanBase \u6559\u7a0b\uff1aOceanBase SQL \u5206\u6790"},"content":{"rendered":"<h1 id=\"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-sql-%e5%88%86%e6%9e%90-NFYyvZXtBL\">OceanBase \u6559\u7a0b\uff1aOceanBase SQL \u5206\u6790<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u6642\u4ee3\uff0c\u6578\u64da\u5eab\u7684\u9078\u64c7\u5c0d\u65bc\u4f01\u696d\u7684\u904b\u71df\u81f3\u95dc\u91cd\u8981\u3002OceanBase \u4f5c\u70ba\u4e00\u6b3e\u9ad8\u6027\u80fd\u7684\u5206\u4f48\u5f0f\u6578\u64da\u5eab\uff0c\u5df2\u7d93\u5728\u591a\u500b\u884c\u696d\u4e2d\u5f97\u5230\u4e86\u5ee3\u6cdb\u61c9\u7528\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e OceanBase \u7684 SQL \u5206\u6790\u529f\u80fd\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u5229\u7528\u9019\u4e00\u5f37\u5927\u7684\u5de5\u5177\u9032\u884c\u6578\u64da\u8655\u7406\u548c\u5206\u6790\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-oceanbase%ef%bc%9f-NFYyvZXtBL\">\u4ec0\u9ebc\u662f OceanBase\uff1f<\/h2>\n<p>OceanBase \u662f\u7531\u963f\u91cc\u5df4\u5df4\u96c6\u5718\u958b\u767c\u7684\u4e00\u6b3e\u5206\u4f48\u5f0f\u6578\u64da\u5eab\uff0c\u65e8\u5728\u652f\u6301\u9ad8\u53ef\u7528\u6027\u548c\u9ad8\u64f4\u5c55\u6027\u7684\u9700\u6c42\u3002\u5b83\u7684\u8a2d\u8a08\u7406\u5ff5\u662f\u70ba\u4e86\u61c9\u5c0d\u5927\u898f\u6a21\u6578\u64da\u8655\u7406\u7684\u6311\u6230\uff0c\u7279\u5225\u662f\u5728\u91d1\u878d\u3001\u96fb\u5546\u7b49\u884c\u696d\u4e2d\u3002OceanBase \u652f\u6301 SQL \u8a9e\u8a00\uff0c\u4e26\u4e14\u517c\u5bb9 MySQL \u548c Oracle \u7684\u8a9e\u6cd5\uff0c\u9019\u4f7f\u5f97\u958b\u767c\u8005\u53ef\u4ee5\u8f15\u9b06\u4e0a\u624b\u3002<\/p>\n<h2 id=\"oceanbase-%e7%9a%84-sql-%e5%88%86%e6%9e%90%e5%8a%9f%e8%83%bd-NFYyvZXtBL\">OceanBase \u7684 SQL \u5206\u6790\u529f\u80fd<\/h2>\n<p>OceanBase \u63d0\u4f9b\u4e86\u5f37\u5927\u7684 SQL \u5206\u6790\u529f\u80fd\uff0c\u9019\u4e9b\u529f\u80fd\u4f7f\u5f97\u7528\u6236\u80fd\u5920\u9ad8\u6548\u5730\u67e5\u8a62\u548c\u8655\u7406\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4e3b\u8981\u7684 SQL \u5206\u6790\u529f\u80fd\uff1a<\/p>\n<ul>\n<li><strong>\u805a\u5408\u51fd\u6578\uff1a<\/strong>OceanBase \u652f\u6301\u591a\u7a2e\u805a\u5408\u51fd\u6578\uff0c\u5982 <code>SUM()<\/code>\u3001<code>AVG()<\/code>\u3001<code>COUNT()<\/code> \u7b49\uff0c\u9019\u4e9b\u51fd\u6578\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u5feb\u901f\u8a08\u7b97\u6578\u64da\u7684\u7d71\u8a08\u4fe1\u606f\u3002<\/li>\n<li><strong>\u7a97\u53e3\u51fd\u6578\uff1a<\/strong>\u7a97\u53e3\u51fd\u6578\u5141\u8a31\u7528\u6236\u5728\u67e5\u8a62\u7d50\u679c\u4e2d\u9032\u884c\u66f4\u8907\u96dc\u7684\u8a08\u7b97\uff0c\u4f8b\u5982 <code>ROW_NUMBER()<\/code>\u3001<code>RANK()<\/code> \u548c <code>DENSE_RANK()<\/code> \u7b49\uff0c\u9019\u4e9b\u51fd\u6578\u53ef\u4ee5\u5728\u4e0d\u6539\u8b8a\u67e5\u8a62\u7d50\u679c\u7684\u60c5\u6cc1\u4e0b\uff0c\u63d0\u4f9b\u984d\u5916\u7684\u5206\u6790\u80fd\u529b\u3002<\/li>\n<li><strong>\u5b50\u67e5\u8a62\uff1a<\/strong>OceanBase \u652f\u6301\u5728 SQL \u67e5\u8a62\u4e2d\u4f7f\u7528\u5b50\u67e5\u8a62\uff0c\u9019\u4f7f\u5f97\u7528\u6236\u53ef\u4ee5\u5728\u4e00\u500b\u67e5\u8a62\u4e2d\u5d4c\u5957\u5176\u4ed6\u67e5\u8a62\uff0c\u5f9e\u800c\u5be6\u73fe\u66f4\u9748\u6d3b\u7684\u6578\u64da\u6aa2\u7d22\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%9f%ba%e6%9c%ac%e7%9a%84-sql-%e6%9f%a5%e8%a9%a2%e7%a4%ba%e4%be%8b-NFYyvZXtBL\">\u57fa\u672c\u7684 SQL \u67e5\u8a62\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684 SQL \u67e5\u8a62\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528 OceanBase \u9032\u884c\u6578\u64da\u5206\u6790\uff1a<\/p>\n<pre><code>\nSELECT \n    department, \n    COUNT(*) AS employee_count, \n    AVG(salary) AS average_salary \nFROM \n    employees \nGROUP BY \n    department;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u5f9e <code>employees<\/code> \u8868\u4e2d\u7372\u53d6\u6bcf\u500b\u90e8\u9580\u7684\u54e1\u5de5\u6578\u91cf\u548c\u5e73\u5747\u85aa\u8cc7\u3002\u9019\u6a23\u7684\u67e5\u8a62\u53ef\u4ee5\u5e6b\u52a9\u7ba1\u7406\u5c64\u4e86\u89e3\u5404\u90e8\u9580\u7684\u904b\u71df\u72c0\u6cc1\u3002<\/p>\n<h2 id=\"%e6%80%a7%e8%83%bd%e5%84%aa%e5%8c%96%e5%bb%ba%e8%ad%b0-NFYyvZXtBL\">\u6027\u80fd\u512a\u5316\u5efa\u8b70<\/h2>\n<p>\u70ba\u4e86\u63d0\u9ad8 OceanBase \u7684 SQL \u67e5\u8a62\u6027\u80fd\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u512a\u5316\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li><strong>\u7d22\u5f15\u4f7f\u7528\uff1a<\/strong>\u5408\u7406\u5730\u4f7f\u7528\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u78ba\u4fdd\u5728\u7d93\u5e38\u67e5\u8a62\u7684\u5217\u4e0a\u5efa\u7acb\u7d22\u5f15\u3002<\/li>\n<li><strong>\u67e5\u8a62\u512a\u5316\uff1a<\/strong>\u907f\u514d\u4f7f\u7528\u904e\u65bc\u8907\u96dc\u7684\u67e5\u8a62\uff0c\u76e1\u91cf\u7c21\u5316 SQL \u8a9e\u53e5\uff0c\u4e26\u4f7f\u7528 EXPLAIN \u8a9e\u53e5\u4f86\u5206\u6790\u67e5\u8a62\u8a08\u5283\u3002<\/li>\n<li><strong>\u6578\u64da\u5206\u5340\uff1a<\/strong>\u5c0d\u65bc\u5927\u6578\u64da\u96c6\uff0c\u8003\u616e\u4f7f\u7528\u6578\u64da\u5206\u5340\u6280\u8853\uff0c\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-NFYyvZXtBL\">\u7d50\u8ad6<\/h2>\n<p>OceanBase \u4f5c\u70ba\u4e00\u6b3e\u9ad8\u6548\u7684\u5206\u4f48\u5f0f\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u5f37\u5927\u7684 SQL \u5206\u6790\u529f\u80fd\uff0c\u80fd\u5920\u6eff\u8db3\u4f01\u696d\u5728\u6578\u64da\u8655\u7406\u548c\u5206\u6790\u65b9\u9762\u7684\u9700\u6c42\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u805a\u5408\u51fd\u6578\u3001\u7a97\u53e3\u51fd\u6578\u548c\u5b50\u67e5\u8a62\uff0c\u4e26\u9075\u5faa\u6027\u80fd\u512a\u5316\u5efa\u8b70\uff0c\u7528\u6236\u53ef\u4ee5\u5145\u5206\u767c\u63ee OceanBase \u7684\u6f5b\u529b\uff0c\u63d0\u5347\u6578\u64da\u5206\u6790\u7684\u6548\u7387\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">VPS<\/a> \u53ca\u5176\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u7684\u61c9\u7528\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 OceanBase \u6559\u7a0b\uff0c\u6df1\u5165\u4e86\u89e3 OceanBase SQL \u5206\u6790\uff0c\u638c\u63e1\u9ad8\u6548\u6570\u636e\u5904\u7406\u4e0e\u67e5\u8be2\u6280\u5de7\uff0c\u63d0\u5347\u6570\u636e\u5e93\u7ba1\u7406\u80fd\u529b\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-160245","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160245","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=160245"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160245\/revisions"}],"predecessor-version":[{"id":160246,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160245\/revisions\/160246"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160245"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160245"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160245"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}