{"id":61427,"date":"2024-10-13T11:02:16","date_gmt":"2024-10-13T03:02:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/61427\/"},"modified":"2024-10-13T11:02:16","modified_gmt":"2024-10-13T03:02:16","slug":"flink-sql-%e7%9f%a5%e5%85%b6%e6%89%80%e4%bb%a5%e7%84%b6%ef%bc%9asql-ddl%ef%bc%81","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/61427\/","title":{"rendered":"Flink SQL \u77e5\u5176\u6240\u4ee5\u7136\uff1aSQL DDL\uff01"},"content":{"rendered":"<h1 id=\"flink-sql-%e7%9f%a5%e5%85%b6%e6%89%80%e4%bb%a5%e7%84%b6%ef%bc%9asql-ddl%ef%bc%81-fYjtcFulnx\">Flink SQL \u77e5\u5176\u6240\u4ee5\u7136\uff1aSQL DDL\uff01<\/h1>\n<p>Apache Flink \u662f\u4e00\u500b\u5f37\u5927\u7684\u6d41\u8655\u7406\u6846\u67b6\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5927\u6578\u64da\u8655\u7406\u548c\u5be6\u6642\u6578\u64da\u5206\u6790\u3002Flink SQL \u662f Flink \u7684\u4e00\u500b\u7d44\u4ef6\uff0c\u5141\u8a31\u7528\u6236\u4f7f\u7528 SQL \u8a9e\u8a00\u4f86\u67e5\u8a62\u6d41\u548c\u6279\u6578\u64da\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e Flink SQL \u4e2d\u7684\u6578\u64da\u5b9a\u7fa9\u8a9e\u8a00\uff08DDL\uff09\uff0c\u5e6b\u52a9\u8b80\u8005\u7406\u89e3\u5176\u57fa\u672c\u6982\u5ff5\u53ca\u7528\u6cd5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-sql-ddl%ef%bc%9f-fYjtcFulnx\">\u4ec0\u9ebc\u662f SQL DDL\uff1f<\/h2>\n<p>SQL DDL\uff08Data Definition Language\uff09\u662f\u7528\u65bc\u5b9a\u7fa9\u6578\u64da\u5eab\u7d50\u69cb\u7684\u8a9e\u8a00\u3002\u5b83\u5305\u62ec\u5275\u5efa\u3001\u4fee\u6539\u548c\u522a\u9664\u6578\u64da\u5eab\u5c0d\u8c61\u7684\u8a9e\u53e5\uff0c\u5982\u8868\u3001\u8996\u5716\u548c\u7d22\u5f15\u3002\u5728 Flink SQL \u4e2d\uff0cDDL \u4e3b\u8981\u7528\u65bc\u5b9a\u7fa9\u6578\u64da\u6e90\u548c\u6578\u64da\u532f\u7684\u7d50\u69cb\uff0c\u9019\u5c0d\u65bc\u6d41\u8655\u7406\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<h2 id=\"flink-sql-ddl-%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-fYjtcFulnx\">Flink SQL DDL \u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728 Flink SQL \u4e2d\uff0cDDL \u8a9e\u53e5\u901a\u5e38\u4ee5 <code>CREATE TABLE<\/code> \u958b\u982d\uff0c\u5f8c\u9762\u8ddf\u96a8\u8868\u7684\u7d50\u69cb\u5b9a\u7fa9\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE user (\n    id INT,\n    name STRING,\n    age INT,\n    PRIMARY KEY (id) NOT ENFORCED\n) WITH (\n    'connector' = 'kafka',\n    'topic' = 'user_topic',\n    'properties.bootstrap.servers' = 'localhost:9092',\n    'format' = 'json'\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba <code>user<\/code> \u7684\u8868\uff0c\u4e26\u6307\u5b9a\u4e86\u5176\u5b57\u6bb5\u53ca\u6578\u64da\u985e\u578b\u3002<code>WITH<\/code> \u5b50\u53e5\u5247\u7528\u65bc\u6307\u5b9a\u6578\u64da\u6e90\u7684\u9023\u63a5\u5668\u548c\u5176\u4ed6\u5c6c\u6027\u3002<\/p>\n<h2 id=\"flink-sql-ddl-%e7%9a%84%e4%b8%bb%e8%a6%81%e7%89%b9%e6%80%a7-fYjtcFulnx\">Flink SQL DDL \u7684\u4e3b\u8981\u7279\u6027<\/h2>\n<ul>\n<li><strong>\u9748\u6d3b\u7684\u6578\u64da\u6e90\u652f\u6301\uff1a<\/strong>Flink SQL \u652f\u6301\u591a\u7a2e\u6578\u64da\u6e90\uff0c\u5305\u62ec Kafka\u3001\u6587\u4ef6\u7cfb\u7d71\u3001JDBC \u7b49\uff0c\u9019\u4f7f\u5f97\u7528\u6236\u53ef\u4ee5\u8f15\u9b06\u5730\u5f9e\u4e0d\u540c\u7684\u6578\u64da\u6e90\u8b80\u53d6\u548c\u5beb\u5165\u6578\u64da\u3002<\/li>\n<li><strong>\u652f\u6301\u8907\u96dc\u6578\u64da\u985e\u578b\uff1a<\/strong>\u9664\u4e86\u57fa\u672c\u7684\u6578\u64da\u985e\u578b\uff0cFlink SQL \u9084\u652f\u6301\u8907\u96dc\u6578\u64da\u985e\u578b\uff0c\u5982 ARRAY\u3001MAP \u548c ROW\uff0c\u9019\u4f7f\u5f97\u7528\u6236\u53ef\u4ee5\u66f4\u9748\u6d3b\u5730\u8655\u7406\u6578\u64da\u3002<\/li>\n<li><strong>\u6642\u9593\u5c6c\u6027\u652f\u6301\uff1a<\/strong>Flink SQL \u5141\u8a31\u7528\u6236\u5b9a\u7fa9\u4e8b\u4ef6\u6642\u9593\u548c\u8655\u7406\u6642\u9593\uff0c\u9019\u5c0d\u65bc\u6d41\u8655\u7406\u61c9\u7528\u81f3\u95dc\u91cd\u8981\u3002<\/li>\n<\/ul>\n<h2 id=\"ddl-%e7%9a%84%e4%bd%bf%e7%94%a8%e5%a0%b4%e6%99%af-fYjtcFulnx\">DDL \u7684\u4f7f\u7528\u5834\u666f<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0cFlink SQL DDL \u53ef\u4ee5\u7528\u65bc\u591a\u7a2e\u5834\u666f\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li><strong>\u5be6\u6642\u6578\u64da\u5206\u6790\uff1a<\/strong>\u7528\u6236\u53ef\u4ee5\u901a\u904e DDL \u5b9a\u7fa9\u6578\u64da\u6e90\uff0c\u7136\u5f8c\u4f7f\u7528 SQL \u67e5\u8a62\u5be6\u6642\u6578\u64da\u6d41\u3002<\/li>\n<li><strong>\u6578\u64da\u96c6\u6210\uff1a<\/strong>\u901a\u904e DDL \u5b9a\u7fa9\u4e0d\u540c\u6578\u64da\u6e90\u7684\u7d50\u69cb\uff0c\u7528\u6236\u53ef\u4ee5\u8f15\u9b06\u5730\u5c07\u6578\u64da\u5f9e\u4e00\u500b\u7cfb\u7d71\u96c6\u6210\u5230\u53e6\u4e00\u500b\u7cfb\u7d71\u3002<\/li>\n<li><strong>\u6578\u64da\u8f49\u63db\uff1a<\/strong>\u7528\u6236\u53ef\u4ee5\u4f7f\u7528 DDL \u5b9a\u7fa9\u4e2d\u9593\u8868\uff0c\u7136\u5f8c\u9032\u884c\u6578\u64da\u8f49\u63db\u548c\u6e05\u6d17\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-fYjtcFulnx\">\u7d50\u8ad6<\/h2>\n<p>Flink SQL \u7684 DDL \u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u9748\u6d3b\u5730\u5b9a\u7fa9\u548c\u7ba1\u7406\u6578\u64da\u7d50\u69cb\u3002\u901a\u904e\u638c\u63e1 DDL \u7684\u57fa\u672c\u7528\u6cd5\uff0c\u7528\u6236\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u9032\u884c\u6578\u64da\u8655\u7406\u548c\u5206\u6790\u3002\u96a8\u8457\u5927\u6578\u64da\u6280\u8853\u7684\u767c\u5c55\uff0cFlink SQL \u5c07\u5728\u6578\u64da\u8655\u7406\u9818\u57df\u626e\u6f14\u8d8a\u4f86\u8d8a\u91cd\u8981\u7684\u89d2\u8272\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u670d\u52d9\u6709\u8208\u8da3\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u60a8\u8f15\u9b06\u642d\u5efa\u548c\u7ba1\u7406\u60a8\u7684\u6578\u64da\u8655\u7406\u74b0\u5883\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Explore Flink SQL DDL to understand its fundamentals and applications, enhancing your data processing skills with practical insights and examples.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-61427","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61427","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=61427"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61427\/revisions"}],"predecessor-version":[{"id":61428,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61427\/revisions\/61428"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=61427"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=61427"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=61427"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}