{"id":160431,"date":"2024-11-03T22:33:08","date_gmt":"2024-11-03T14:33:08","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160431\/"},"modified":"2024-11-03T22:33:09","modified_gmt":"2024-11-03T14:33:09","slug":"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-%e6%b5%ae%e9%bb%9e%e6%95%b8%e5%ad%97","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160431\/","title":{"rendered":"OceanBase \u6559\u7a0b\uff1aOceanBase \u6d6e\u9ede\u6578\u5b57"},"content":{"rendered":"<h1 id=\"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-%e6%b5%ae%e9%bb%9e%e6%95%b8%e5%ad%97-aSeySgLcVE\">OceanBase \u6559\u7a0b\uff1aOceanBase \u6d6e\u9ede\u6578\u5b57<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u5eab\u6280\u8853\u4e2d\uff0cOceanBase \u4f5c\u70ba\u4e00\u6b3e\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\u4e8b\u52d9\u8655\u7406\uff0c\u9084\u5177\u5099\u826f\u597d\u7684\u64f4\u5c55\u6027\u548c\u53ef\u9760\u6027\u3002\u5728\u9019\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u5011\u5c07\u6df1\u5165\u63a2\u8a0e OceanBase \u4e2d\u7684\u6d6e\u9ede\u6578\u5b57\u8655\u7406\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u4f7f\u7528\u9019\u4e00\u7279\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%b5%ae%e9%bb%9e%e6%95%b8%e5%ad%97%ef%bc%9f-aSeySgLcVE\">\u4ec0\u9ebc\u662f\u6d6e\u9ede\u6578\u5b57\uff1f<\/h2>\n<p>\u6d6e\u9ede\u6578\u5b57\u662f\u4e00\u7a2e\u7528\u65bc\u8868\u793a\u5be6\u6578\u7684\u6578\u64da\u985e\u578b\uff0c\u901a\u5e38\u7528\u65bc\u9700\u8981\u9ad8\u7cbe\u5ea6\u8a08\u7b97\u7684\u5834\u5408\u3002\u5b83\u7684\u8868\u793a\u65b9\u5f0f\u662f\u5c07\u6578\u5b57\u5206\u70ba\u4e09\u90e8\u5206\uff1a\u7b26\u865f\u4f4d\u3001\u6307\u6578\u4f4d\u548c\u5c3e\u6578\u4f4d\u3002\u9019\u7a2e\u8868\u793a\u65b9\u5f0f\u4f7f\u5f97\u6d6e\u9ede\u6578\u5b57\u80fd\u5920\u8868\u793a\u975e\u5e38\u5927\u6216\u975e\u5e38\u5c0f\u7684\u6578\u503c\uff0c\u4e26\u4e14\u80fd\u5920\u9032\u884c\u6709\u6548\u7684\u6578\u5b78\u904b\u7b97\u3002<\/p>\n<h2 id=\"oceanbase-%e4%b8%ad%e7%9a%84%e6%b5%ae%e9%bb%9e%e6%95%b8%e5%ad%97%e9%a1%9e%e5%9e%8b-aSeySgLcVE\">OceanBase \u4e2d\u7684\u6d6e\u9ede\u6578\u5b57\u985e\u578b<\/h2>\n<p>\u5728 OceanBase \u4e2d\uff0c\u6d6e\u9ede\u6578\u5b57\u4e3b\u8981\u6709\u5169\u7a2e\u6578\u64da\u985e\u578b\uff1aFLOAT \u548c DOUBLE\u3002<\/p>\n<ul>\n<li><strong>FLOAT\uff1a<\/strong>\u9019\u662f\u4e00\u7a2e\u55ae\u7cbe\u5ea6\u6d6e\u9ede\u6578\uff0c\u901a\u5e38\u4f54\u7528 4 \u500b\u5b57\u7bc0\u3002\u5b83\u7684\u6709\u6548\u4f4d\u6578\u7d04\u70ba 7 \u4f4d\u5341\u9032\u5236\u6578\u3002<\/li>\n<li><strong>DOUBLE\uff1a<\/strong>\u9019\u662f\u4e00\u7a2e\u96d9\u7cbe\u5ea6\u6d6e\u9ede\u6578\uff0c\u901a\u5e38\u4f54\u7528 8 \u500b\u5b57\u7bc0\u3002\u5b83\u7684\u6709\u6548\u4f4d\u6578\u7d04\u70ba 15 \u4f4d\u5341\u9032\u5236\u6578\u3002<\/li>\n<\/ul>\n<p>\u9078\u64c7\u4f7f\u7528\u54ea\u4e00\u7a2e\u6d6e\u9ede\u6578\u5b57\u985e\u578b\uff0c\u901a\u5e38\u53d6\u6c7a\u65bc\u61c9\u7528\u7684\u9700\u6c42\u3002\u5982\u679c\u9700\u8981\u66f4\u9ad8\u7684\u7cbe\u5ea6\uff0c\u5247\u61c9\u9078\u64c7 DOUBLE\uff1b\u5982\u679c\u5c0d\u7cbe\u5ea6\u8981\u6c42\u4e0d\u9ad8\u4e14\u5e0c\u671b\u7bc0\u7701\u5b58\u5132\u7a7a\u9593\uff0c\u5247\u53ef\u4ee5\u9078\u64c7 FLOAT\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%9c%a8-oceanbase-%e4%b8%ad%e4%bd%bf%e7%94%a8%e6%b5%ae%e9%bb%9e%e6%95%b8%e5%ad%97-aSeySgLcVE\">\u5982\u4f55\u5728 OceanBase \u4e2d\u4f7f\u7528\u6d6e\u9ede\u6578\u5b57<\/h2>\n<p>\u5728 OceanBase \u4e2d\u4f7f\u7528\u6d6e\u9ede\u6578\u5b57\u975e\u5e38\u7c21\u55ae\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u57fa\u672c\u7684 SQL \u8a9e\u53e5\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5275\u5efa\u8868\u683c\u4e26\u63d2\u5165\u6d6e\u9ede\u6578\u5b57\uff1a<\/p>\n<pre><code>-- \u5275\u5efa\u4e00\u500b\u5305\u542b\u6d6e\u9ede\u6578\u5b57\u7684\u8868\u683c\nCREATE TABLE example_floats (\n    id INT PRIMARY KEY,\n    float_value FLOAT,\n    double_value DOUBLE\n);\n\n-- \u63d2\u5165\u6578\u64da\nINSERT INTO example_floats (id, float_value, double_value) VALUES (1, 3.14, 2.718281828459);\nINSERT INTO example_floats (id, float_value, double_value) VALUES (2, 1.414, 1.618033988749);\n<\/code><\/pre>\n<p>\u5728\u67e5\u8a62\u6d6e\u9ede\u6578\u5b57\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528\u6a19\u6e96\u7684 SQL \u67e5\u8a62\u8a9e\u53e5\uff1a<\/p>\n<pre><code>-- \u67e5\u8a62\u6240\u6709\u6578\u64da\nSELECT * FROM example_floats;\n\n-- \u67e5\u8a62\u7279\u5b9a\u689d\u4ef6\u7684\u6578\u64da\nSELECT * FROM example_floats WHERE float_value &gt; 2.0;\n<\/code><\/pre>\n<h2 id=\"%e6%b5%ae%e9%bb%9e%e6%95%b8%e5%ad%97%e7%9a%84%e7%b2%be%e5%ba%a6%e5%95%8f%e9%a1%8c-aSeySgLcVE\">\u6d6e\u9ede\u6578\u5b57\u7684\u7cbe\u5ea6\u554f\u984c<\/h2>\n<p>\u5728\u4f7f\u7528\u6d6e\u9ede\u6578\u5b57\u6642\uff0c\u958b\u767c\u8005\u9700\u8981\u6ce8\u610f\u7cbe\u5ea6\u554f\u984c\u3002\u7531\u65bc\u6d6e\u9ede\u6578\u5b57\u7684\u8868\u793a\u65b9\u5f0f\uff0c\u67d0\u4e9b\u6578\u5b57\u5728\u8a08\u7b97\u904e\u7a0b\u4e2d\u53ef\u80fd\u6703\u51fa\u73fe\u7cbe\u5ea6\u640d\u5931\u3002\u4f8b\u5982\uff0c0.1 \u548c 0.2 \u7684\u548c\u53ef\u80fd\u4e0d\u7b49\u65bc 0.3\u3002\u9019\u662f\u56e0\u70ba\u67d0\u4e9b\u5341\u9032\u5236\u6578\u7121\u6cd5\u7cbe\u78ba\u5730\u7528\u4e8c\u9032\u5236\u8868\u793a\u3002<\/p>\n<p>\u70ba\u4e86\u907f\u514d\u9019\u4e9b\u554f\u984c\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u6574\u6578\u4f86\u9032\u884c\u8a08\u7b97\uff0c\u7136\u5f8c\u518d\u5c07\u7d50\u679c\u8f49\u63db\u70ba\u6d6e\u9ede\u6578\u3002\u6b64\u5916\uff0cOceanBase \u4e5f\u63d0\u4f9b\u4e86\u6578\u64da\u985e\u578b\u7684\u9078\u64c7\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6839\u64da\u5be6\u969b\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-aSeySgLcVE\">\u7d50\u8ad6<\/h2>\n<p>OceanBase \u4f5c\u70ba\u4e00\u6b3e\u5f37\u5927\u7684\u5206\u4f48\u5f0f\u6578\u64da\u5eab\uff0c\u5c0d\u65bc\u6d6e\u9ede\u6578\u5b57\u7684\u652f\u6301\u4f7f\u5f97\u958b\u767c\u8005\u80fd\u5920\u9748\u6d3b\u5730\u8655\u7406\u5404\u7a2e\u6578\u64da\u8a08\u7b97\u9700\u6c42\u3002\u5728\u4f7f\u7528\u6d6e\u9ede\u6578\u5b57\u6642\uff0c\u4e86\u89e3\u5176\u7279\u6027\u548c\u6f5b\u5728\u7684\u7cbe\u5ea6\u554f\u984c\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u5e0c\u671b\u9019\u7bc7\u6587\u7ae0\u80fd\u5920\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7406\u89e3 OceanBase \u4e2d\u7684\u6d6e\u9ede\u6578\u5b57\u8655\u7406\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">VPS<\/a> \u548c <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 OceanBase \u6d6e\u9ede\u6578\u5b57\u7684\u8a73\u7d30\u6559\u7a0b\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u4f7f\u7528\u548c\u7ba1\u7406\u6d6e\u9ede\u6578\u64da\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u8207\u6e96\u78ba\u6027\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-160431","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160431","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=160431"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160431\/revisions"}],"predecessor-version":[{"id":160432,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160431\/revisions\/160432"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160431"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160431"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160431"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}