{"id":205089,"date":"2025-05-29T10:30:52","date_gmt":"2025-05-29T02:30:52","guid":{"rendered":"https:\/\/server.hk\/cnblog\/205089\/"},"modified":"2025-05-29T10:30:52","modified_gmt":"2025-05-29T02:30:52","slug":"dbt-%e5%ae%8f%e6%8c%87%e5%8d%97-%e7%9b%ae%e7%9a%84%e3%80%81%e4%bc%98%e7%82%b9%e5%92%8c%e7%94%a8%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205089\/","title":{"rendered":"dbt \u5b8f\u6307\u5357 &#8211; \u76ee\u7684\u3001\u4f18\u70b9\u548c\u7528\u6cd5"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>dbt \u5b8f\u6307\u5357 &#8211; \u76ee\u7684\u3001\u4f18\u70b9\u548c\u7528\u6cd5<\/h1>\n<p>\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u6253\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300adbt \u5b8f\u6307\u5357 &#8211; \u76ee\u7684\u3001\u4f18\u70b9\u548c\u7528\u6cd5\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\u5427\uff01\u6587\u4e2d\u5185\u5bb9\u5305\u542b<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9&#8230;\u5e0c\u671b\u4f60\u80fd\u5728\u9605\u8bfb\u672c\u6587\u540e\uff0c\u80fd\u771f\u771f\u5b9e\u5b9e\u5b66\u5230\u77e5\u8bc6\u6216\u8005\u5e2e\u4f60\u89e3\u51b3\u5fc3\u4e2d\u7684\u7591\u60d1\uff0c\u4e5f\u6b22\u8fce\u5927\u4f6c\u6216\u8005\u65b0\u4eba\u670b\u53cb\u4eec\u591a\u7559\u8a00\u8bc4\u8bba\uff0c\u591a\u7ed9\u5efa\u8bae\uff01\u8c22\u8c22\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241123\/1732334633674154293fa0d.jpg\" class=\"aligncenter\"><\/p>\n<ul>\n<li>\u963f\u5e15\u5947\u51b0\u5c71 101<\/li>\n<li>apache \u51b0\u5c71\u5b9e\u8df5\u4ecb\u7ecd<\/li>\n<li>\u514d\u8d39 apache iceberg \u901f\u6210\u8bfe\u7a0b<\/li>\n<li>apache iceberg \u7684\u514d\u8d39\u526f\u672c\uff1a\u6743\u5a01\u6307\u5357<\/li>\n<\/ul>\n<p>\u4f7f\u7528 dbt \u65f6\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u7684\u6700\u5f3a\u5927\u7684\u529f\u80fd\u4e4b\u4e00\u662f<strong>\u5b8f<\/strong>\u3002\u5b8f\u5141\u8bb8\u60a8\u7f16\u5199\u53ef\u5728\u6574\u4e2a dbt \u9879\u76ee\u4e2d\u4f7f\u7528\u7684\u53ef\u91cd\u7528\u4ee3\u7801\uff0c\u5e2e\u52a9\u60a8\u4f18\u5316\u5f00\u53d1\u3001\u51cf\u5c11\u5197\u4f59\u5e76\u6807\u51c6\u5316\u5e38\u89c1\u6a21\u5f0f\u3002\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u63a2\u8ba8 dbt \u5b8f\u7684\u7528\u9014\u3001\u5b83\u4eec\u5982\u4f55\u5e2e\u52a9\u60a8\u7b80\u5316\u6570\u636e\u8f6c\u6362\u5de5\u4f5c\u6d41\u7a0b\u4ee5\u53ca\u5982\u4f55\u6709\u6548\u5730\u4f7f\u7528\u5b83\u4eec\u3002<\/p>\n<p>\u5728\u8f83\u9ad8\u7684\u5c42\u9762\u4e0a\uff0c<strong>dbt \u5b8f<\/strong> \u662f\u7528 jinja\uff08\u4e00\u79cd\u96c6\u6210\u5230 dbt \u7684\u6a21\u677f\u8bed\u8a00\uff09\u7f16\u5199\u7684\u53ef\u91cd\u7528\u4ee3\u7801\u7247\u6bb5\u3002\u5b8f\u7684\u4f5c\u7528\u7c7b\u4f3c\u4e8e\u51fd\u6570\uff0c\u60a8\u53ef\u4ee5\u5728 dbt \u9879\u76ee\u4e2d\u7684\u5404\u4e2a\u4f4d\u7f6e\uff08\u4f8b\u5982\u6a21\u578b\u3001\u6d4b\u8bd5\uff0c\u751a\u81f3\u5176\u4ed6\u5b8f\uff09\u8c03\u7528\u5b83\u4eec\u3002\u5b83\u4eec\u5141\u8bb8\u60a8\u7b80\u5316\u91cd\u590d\u6027\u4efb\u52a1\u5e76\u5411 sql \u8f6c\u6362\u6dfb\u52a0\u903b\u8f91\u3002<\/p>\n<p>\u60a8\u53ef\u4ee5\u5c06\u5b8f\u89c6\u4e3a<strong>dry<\/strong>\uff08\u4e0d\u8981\u91cd\u590d\u81ea\u5df1\uff09\u60a8\u7684 dbt \u4ee3\u7801\u7684\u4e00\u79cd\u65b9\u5f0f\uff0c\u8fd9\u5728\u5927\u578b\u9879\u76ee\u4e2d\u7279\u522b\u6709\u7528\uff0c\u56e0\u4e3a\u5728\u8bb8\u591a\u6a21\u578b\u4e2d\u91cd\u590d\u7c7b\u4f3c\u7684 sql \u6a21\u5f0f\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u5728\u9879\u76ee\u4e2d\u4f7f\u7528 dbt \u5b8f\u7684\u4e00\u4e9b\u4e3b\u8981\u597d\u5904\uff1a<\/p>\n<p>\u5728\u8bb8\u591a\u6570\u636e\u8f6c\u6362\u5de5\u4f5c\u6d41\u7a0b\u4e2d\uff0c\u60a8\u53ef\u80fd\u4f1a\u53d1\u73b0\u81ea\u5df1\u5728\u591a\u4e2a\u6a21\u578b\u4e2d\u7f16\u5199\u76f8\u540c\u7684 sql \u903b\u8f91\u3002\u4f8b\u5982\uff0c\u8fc7\u6ee4\u6389\u65e0\u6548\u8bb0\u5f55\u6216\u5e94\u7528\u7279\u5b9a\u8f6c\u6362\u3002\u901a\u8fc7\u5b8f\uff0c\u60a8\u53ef\u4ee5\u5c06\u6b64\u903b\u8f91\u62bd\u8c61\u4e3a\u53ef\u91cd\u7528\u7684\u51fd\u6570\uff0c\u5e76\u5728\u9700\u8981\u65f6\u8c03\u7528\u5b83\u4eec\uff0c\u4ece\u800c\u51cf\u5c11\u4ee3\u7801\u91cd\u590d\u3002<\/p>\n<p>\u5b8f\u6709\u52a9\u4e8e\u786e\u4fdd\u901a\u7528\u903b\u8f91\uff08\u4f8b\u5982\u6570\u636e\u9a8c\u8bc1\u6216\u81ea\u5b9a\u4e49\u8054\u63a5\uff09\u5728\u6574\u4e2a\u9879\u76ee\u4e2d\u4e00\u81f4\u5e94\u7528\u3002\u8fd9\u79cd\u6807\u51c6\u5316\u51cf\u5c11\u4e86\u9519\u8bef\u7684\u53ef\u80fd\u6027\uff0c\u5e76\u786e\u4fdd\u60a8\u7684\u8f6c\u6362\u5728\u4e0d\u540c\u6a21\u578b\u4e2d\u9075\u5faa\u76f8\u540c\u7684\u89c4\u5219\u3002<\/p>\n<p>\u901a\u8fc7\u4f7f\u7528\u5b8f\uff0c\u60a8\u53ef\u4ee5\u5c06\u590d\u6742\u7684\u903b\u8f91\u5206\u89e3\u4e3a\u53ef\u7ba1\u7406\u3001\u53ef\u91cd\u7528\u7684\u7ec4\u4ef6\u3002\u8fd9\u7b80\u5316\u4e86\u60a8\u7684 sql \u6a21\u578b\uff0c\u4f7f\u5176\u66f4\u6613\u4e8e\u9605\u8bfb\u3001\u7ef4\u62a4\u548c\u8c03\u8bd5\u3002<\/p>\n<p>\u5b8f\u5141\u8bb8\u60a8\u7f16\u5199\u57fa\u4e8e\u53d8\u91cf\u3001\u914d\u7f6e\u8bbe\u7f6e\u6216\u8f93\u5165\u6765\u9002\u5e94\u4e0d\u540c\u7528\u4f8b\u7684 sql\u3002\u8fd9\u79cd\u52a8\u6001\u751f\u6210 sql \u53ef\u4ee5\u5e2e\u52a9\u60a8\u5904\u7406\u5404\u79cd\u8fb9\u7f18\u60c5\u51b5\u548c\u73af\u5883\uff0c\u800c\u65e0\u9700\u624b\u52a8\u66f4\u6539\u4ee3\u7801\u3002<\/p>\n<p>\u5b9a\u4e49\u5b8f\u540e\uff0c\u5b83\u53ef\u4ee5\u5728\u591a\u4e2a\u6a21\u578b\u4e2d\u4f7f\u7528\uff0c\u786e\u4fdd\u5bf9\u5b8f\u7684\u4efb\u4f55\u66f4\u65b0\u90fd\u53cd\u6620\u5728\u6574\u4e2a\u9879\u76ee\u4e2d\u3002\u8fd9\u4fc3\u8fdb\u4e86\u66f4\u8f7b\u677e\u7684\u7ef4\u62a4\u548c\u66f4\u5feb\u7684\u66f4\u65b0\u3002<\/p>\n<p>\u5b8f\u901a\u5e38\u5728 dbt \u9879\u76ee\u7684 macros\/ \u76ee\u5f55\u4e0b\u7684 .sql \u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u4ee5\u4e0b\u662f\u8ba1\u7b97\u5217\u5e73\u5747\u503c\u7684\u7b80\u5355\u5b8f\u793a\u4f8b\uff1a<\/p>\n<pre>-- macros\/calculate_average.sql\n\n{% macro calculate_average(column_name) %}\n    avg({{ column_name }})\n{% endmacro %}\n<\/pre>\n<p>\u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u5b8fcalculate_average\u63a5\u53d7\u5217\u540d\u4f5c\u4e3a\u53c2\u6570\uff0c\u5e76\u8fd4\u56de\u5e94\u7528\u4e8e\u8be5\u5217\u7684avg() sql\u51fd\u6570\u3002<\/p>\n<p>\u5b9a\u4e49\u5b8f\u540e\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u5728\u4efb\u4f55\u6a21\u578b\u4e2d\u8c03\u7528\u5b83\uff1a<\/p>\n<pre>-- models\/my_model.sql\n\nselect\n    {{ calculate_average('price') }} as avg_price,\n    category\nfrom\n    {{ ref('products') }}\ngroup by\n    category\n<\/pre>\n<p>\u8fd9\u91cc\uff0c\u6211\u4eec\u5728 select \u8bed\u53e5\u4e2d\u4f7f\u7528calculate_average \u5b8f\u6765\u8ba1\u7b97 products \u8868\u4e2d\u7684\u5e73\u5747\u4ef7\u683c\uff0c\u800c\u4e0d\u9700\u8981\u624b\u52a8\u91cd\u590d\u903b\u8f91\u3002<\/p>\n<p>\u5b8f\u8fd8\u53ef\u4ee5\u4e0e\u53d8\u91cf\u7ec4\u5408\u4ee5\u589e\u52a0\u66f4\u591a\u7075\u6d3b\u6027\u3002\u4f8b\u5982\uff0c\u8ba9\u6211\u4eec\u5b9a\u4e49\u4e00\u4e2a\u57fa\u4e8e\u53d8\u91cf\u52a8\u6001\u6784\u5efa where \u5b50\u53e5\u7684\u5b8f\uff1a<\/p>\n<pre>-- macros\/filter_by_status.sql\n\n{% macro filter_by_status(status) %}\n    where status = '{{ status }}'\n{% endmacro %}\n<\/pre>\n<p>\u60a8\u73b0\u5728\u53ef\u4ee5\u4f7f\u7528\u6b64\u5b8f\u6839\u636e\u53d8\u91cf\u8fc7\u6ee4\u6570\u636e\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre>-- models\/orders.sql\n\nselect *\nfrom {{ ref('orders') }}\n{{ filter_by_status(var('order_status', 'completed')) }}\n<\/pre>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cfilter_by_status \u52a8\u6001\u6dfb\u52a0\u4e00\u4e2a where \u5b50\u53e5\uff0c\u901a\u8fc7 order_status \u8fc7\u6ee4\u7ed3\u679c\uff0c\u5982\u679c\u6ca1\u6709\u63d0\u4f9b\uff0c\u5219\u9ed8\u8ba4\u4e3a\u5df2\u5b8c\u6210\u3002<\/p>\n<p><strong>\u590d\u6742\u5b8f\uff1a<\/strong>\u52a8\u6001\u8868\u8fde\u63a5<br \/> \u4e0b\u9762\u662f\u4e00\u4e2a\u66f4\u9ad8\u7ea7\u7684\u5b8f\u793a\u4f8b\uff0c\u5b83\u6839\u636e\u4f20\u9012\u7ed9\u5b83\u7684\u53c2\u6570\u521b\u5efa\u52a8\u6001\u8fde\u63a5\uff1a<\/p>\n<pre>-- macros\/join_tables.sql\n\n{% macro join_tables(left_table, right_table, join_key) %}\n    select\n        left.*,\n        right.*\n    from\n        {{ ref(left_table) }} as left\n    inner join\n        {{ ref(right_table) }} as right\n    on\n        left.{{ join_key }} = right.{{ join_key }}\n{% endmacro %}\n<\/pre>\n<p>\u8be5\u5b8f\u91c7\u7528\u4e24\u4e2a\u8868\u540d\u548c\u4e00\u4e2a\u8fde\u63a5\u952e\uff0c\u7136\u540e\u5728\u8868\u4e4b\u95f4\u52a8\u6001\u521b\u5efa inner join\uff1a<\/p>\n<pre>-- models\/joined_data.sql\n\n{{ join_tables('customers', 'orders', 'customer_id') }}\n<\/pre>\n<p>\u5f53\u60a8\u8c03\u7528\u6b64\u5b8f\u65f6\uff0c\u5b83\u4f1a\u751f\u6210\u5b8c\u6574\u7684 sql\uff0c\u7528\u4e8e\u5728 customer_id \u952e\u4e0a\u8fde\u63a5\u5ba2\u6237\u548c\u8ba2\u5355\u8868\u3002<\/p>\n<ul>\n<li>\n<p><strong>\u4fdd\u6301\u5b8f\u7684\u7126\u70b9\uff1a<\/strong>\u6bcf\u4e2a\u5b8f\u90fd\u5e94\u8be5\u6267\u884c\u4e00\u4e2a\u5355\u4e00\u7684\u3001\u5b9a\u4e49\u660e\u786e\u7684\u4efb\u52a1\u3002\u907f\u514d\u5c06\u592a\u591a\u903b\u8f91\u585e\u8fdb\u5355\u4e2a\u5b8f\u4e2d\uff1b\u76f8\u53cd\uff0c\u5c06\u5176\u5206\u89e3\u4e3a\u66f4\u5c0f\u7684\u3001\u53ef\u91cd\u590d\u4f7f\u7528\u7684\u7ec4\u4ef6\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u4f7f\u7528\u6e05\u6670\u7684\u547d\u540d\u7ea6\u5b9a\uff1a<\/strong>\u786e\u4fdd\u5b8f\u540d\u79f0\u5177\u6709\u63cf\u8ff0\u6027\uff0c\u4ee5\u4fbf\u5728\u6a21\u578b\u4e2d\u4f7f\u7528\u65f6\u5176\u7528\u9014\u6e05\u6670\u3002\u8fd9\u4f7f\u5f97\u4ee3\u7801\u66f4\u5bb9\u6613\u7406\u89e3\u548c\u7ef4\u62a4\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u5904\u7406\u8fb9\u7f18\u60c5\u51b5\uff1a<\/strong>\u59cb\u7ec8\u8003\u8651\u5b8f\u4e2d\u53ef\u80fd\u7684\u8fb9\u7f18\u60c5\u51b5\uff08\u4f8b\u5982\u7a7a\u503c\u6216\u610f\u5916\u8f93\u5165\uff09\uff0c\u4ee5\u786e\u4fdd\u5b83\u4eec\u5728\u4e0d\u540c\u573a\u666f\u4e0b\u53ef\u9760\u5730\u6267\u884c\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u5728\u6d4b\u8bd5\u4e2d\u5229\u7528\u5b8f\uff1a<\/strong>\u60a8\u8fd8\u53ef\u4ee5\u5728 dbt \u6d4b\u8bd5\u4e2d\u4f7f\u7528\u5b8f\u6765\u521b\u5efa\u53ef\u91cd\u7528\u7684\u6d4b\u8bd5\u903b\u8f91\uff0c\u786e\u4fdd\u9879\u76ee\u9a8c\u8bc1\u6b65\u9aa4\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u8bb0\u5f55\u60a8\u7684\u5b8f\uff1a<\/strong>\u5411\u60a8\u7684\u5b8f\u6dfb\u52a0\u6ce8\u91ca\u548c\u6587\u6863\u4ee5\u89e3\u91ca\u5176\u76ee\u7684\u3001\u53c2\u6570\u548c\u7528\u6cd5\u3002\u5f53\u591a\u4e2a\u56e2\u961f\u6210\u5458\u4e3a\u540c\u4e00\u4e2a\u9879\u76ee\u505a\u51fa\u8d21\u732e\u65f6\uff0c\u8fd9\u5c24\u5176\u6709\u7528\u3002<\/p>\n<\/li>\n<\/ul>\n<p>dbt \u5b8f\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e2e\u52a9\u60a8\u5728\u6570\u636e\u8f6c\u6362\u9879\u76ee\u4e2d\u7f16\u5199\u66f4\u6e05\u6670\u3001\u66f4\u6613\u4e8e\u7ef4\u62a4\u4e14\u53ef\u91cd\u7528\u7684\u4ee3\u7801\u3002\u901a\u8fc7\u62bd\u8c61\u590d\u6742\u903b\u8f91\u3001\u6807\u51c6\u5316\u91cd\u590d\u6a21\u5f0f\u4ee5\u53ca\u52a8\u6001\u751f\u6210 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