{"id":598,"date":"2025-01-11T15:28:59","date_gmt":"2025-01-11T15:28:59","guid":{"rendered":"https:\/\/smolagents.org\/?post_type=docs&#038;p=598"},"modified":"2025-01-11T15:40:54","modified_gmt":"2025-01-11T15:40:54","password":"","slug":"text-to-sql-example","status":"publish","type":"docs","link":"https:\/\/smolagents.org\/zh_tw\/docs\/text-to-sql-example\/","title":{"rendered":"\u6587\u5b57\u8f49 SQL \u5be6\u4f8b"},"content":{"rendered":"<p>\u5728\u672c\u6559\u5b78\u4e2d\uff0c\u6211\u5011\u5c07\u77ad\u89e3\u5982\u4f55\u5229\u7528 SQL \u4f86\u5be6\u4f5c\u4ee3\u7406\u7a0b\u5f0f\u3002&nbsp;<code>smolagents<\/code>.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u8b93\u6211\u5011\u5f9e\u9ec3\u91d1\u554f\u984c\u958b\u59cb\uff1a\u70ba\u4f55\u4e0d\u4fdd\u6301\u7c21\u55ae\uff0c\u4f7f\u7528\u6a19\u6e96\u7684\u6587\u5b57\u8f49 SQL \u7ba1\u9053\uff1f<\/p>\n<\/blockquote>\n\n\n\n<p>\u6a19\u6e96\u7684 text-to-sql pipeline \u5f88\u8106\u5f31\uff0c\u56e0\u70ba\u7522\u751f\u7684 SQL \u67e5\u8a62\u53ef\u80fd\u4e0d\u6b63\u78ba\u3002\u66f4\u7cdf\u7684\u662f\uff0c\u67e5\u8a62\u53ef\u80fd\u4e0d\u6b63\u78ba\uff0c\u4f46\u4e0d\u6703\u7522\u751f\u932f\u8aa4\uff0c\u53cd\u800c\u6703\u63d0\u4f9b\u4e00\u4e9b\u4e0d\u6b63\u78ba\/\u7121\u7528\u7684\u8f38\u51fa\uff0c\u4f46\u4e0d\u6703\u767c\u51fa\u8b66\u5831\u3002<\/p>\n\n\n\n<p>\ud83d\udc49 \u76f8\u53cd\u5730\uff0c\u4ee3\u7406\u7cfb\u7d71\u80fd\u5920\u56b4\u8b39\u5730\u6aa2\u67e5\u8f38\u51fa\uff0c\u4e26\u6c7a\u5b9a\u662f\u5426\u9700\u8981\u8b8a\u66f4\u67e5\u8a62\uff0c\u5f9e\u800c\u5927\u5e45\u63d0\u5347\u6548\u80fd\u3002<\/p>\n\n\n\n<p>\u8b93\u6211\u5011\u5efa\u7acb\u9019\u500b\u4ee3\u7406\uff01\ud83d\udcaa<\/p>\n\n\n\n<p>\u9996\u5148\uff0c\u6211\u5011\u8a2d\u5b9a SQL \u74b0\u5883\uff1a<\/p>\n\n\n\n<p>\u8907\u88fd<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\u5f9e sqlalchemy import (\n    create_engine\u3001\n    MetaData\u3001\n    \u8868\u3001\n    \u6b04\u4f4d\u3001\n    \u5b57\u4e32\n    \u6574\u6578\n    \u6d6e\u9ede\u6578\u3001\n    \u63d2\u5165\u3001\n    \u6aa2\u67e5\n    \u6587\u5b57\u3001\n)\n\nengine = create_engine(\"sqlite:\/\/\/:memory:\")\nmetadata_obj = MetaData()\n\n<em># \u5efa\u7acb\u57ce\u5e02 SQL \u8cc7\u6599\u8868<\/em>\ntable_name = \u300c\u6536\u64da\u300d\nreceipts = Table(\n    table_name\u3001\n    metadata_obj\u3001\n    Column(\"receipt_id\", Integer, primary_key=True)\u3001\n    Column(\"customer_name\", String(16), primary_key=True)\u3001\n    Column(\"price\", Float)\u3001\n    Column(\"tip\", Float)\u3001\n)\nmetadata_obj.create_all(engine)\n\nrows = [\n    {\"receipt_id\"\uff1a1, \"customer_name\"\uff1a\"Alan Payne\", \"price\"\uff1a12.06, \"tip\"\uff1a1.20},\n    {\"receipt_id\"\uff1a2, \"customer_name\"\uff1a\"Alex Mason\", \"price\"\uff1a23.86, \"tip\"\uff1a0.24},\n    {\"receipt_id\"\uff1a3, \"customer_name\"\uff1a\"Woodrow Wilson\", \"price\"\uff1a53.43, \"tip\"\uff1a5.43},\n    {\"receipt_id\"\uff1a4, \"customer_name\"\uff1a\"Margaret James\", \"price\"\uff1a21.11, \"tip\"\uff1a1.00},\n]\nfor row in rows\uff1a\n    stmt = insert(receipts).values(**row)\n    with engine.begin() as connection\uff1a\n        cursor = connection.execute(stmt)<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/huggingface.co\/docs\/smolagents\/examples\/text_to_sql#build-our-agent\" target=\"_blank\" rel=\"noopener\"><\/a>\u5efa\u7acb\u6211\u5011\u7684\u4ee3\u7406<\/h3>\n\n\n\n<p>\u73fe\u5728\u8b93\u6211\u5011\u5229\u7528\u5de5\u5177\u4f86\u6aa2\u7d22\u6211\u5011\u7684 SQL \u8cc7\u6599\u8868\u3002<\/p>\n\n\n\n<p>\u5de5\u5177\u7684\u63cf\u8ff0\u5c6c\u6027\u5c07\u88ab\u4ee3\u7406\u7cfb\u7d71\u5d4c\u5165 LLM \u7684\u63d0\u793a\u4e2d\uff1a\u5b83\u63d0\u4f9b LLM \u95dc\u65bc\u5982\u4f55\u4f7f\u7528\u5de5\u5177\u7684\u8cc7\u8a0a\u3002\u9019\u5c31\u662f\u6211\u5011\u8981\u63cf\u8ff0 SQL \u8868\u7684\u5730\u65b9\u3002<\/p>\n\n\n\n<p>\u8907\u88fd<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">inspector = inspect(engine)\ncolumns_info = [(col[\"name\"], col[\"type\"]) for col in inspector.get_columns(\"receipts\")]\n\ntable_description = \"Columns:\\n\" + \"\\n\".join([f\" - {name}: {col_type}\" for name, col_type in columns_info])\nprint(table_description)<\/pre>\n\n\n\n<p>\u8907\u88fd<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\u6b04\u4f4d\uff1a\n  - receipt_id\uff1aINTEGER\n  - customer_name: VARCHAR(16)\n  - \u50f9\u683c\uff1aFLOAT\n  - \u5c0f\u8cbb\uff1aFLOAT<\/pre>\n\n\n\n<p>\u73fe\u5728\u8b93\u6211\u5011\u5efa\u7acb\u6211\u5011\u7684\u5de5\u5177\u3002\u5b83\u9700\u8981\u4ee5\u4e0b\u689d\u4ef6\uff1a(\u8b80\u53d6\u00a0<a href=\"https:\/\/huggingface.co\/docs\/smolagents\/tutorials\/tools\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">\u5de5\u5177\u6587\u4ef6<\/a>\u00a0\u5982\u9700\u8a73\u7d30\u8cc7\u8a0a)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5e36\u6709\u00a0<code>Args\uff1a<\/code>\u00a0\u5217\u51fa\u8ad6\u9ede\u7684\u90e8\u5206\u3002<\/li>\n\n\n\n<li>\u8f38\u5165\u548c\u8f38\u51fa\u7684\u985e\u578b\u63d0\u793a\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u8907\u88fd<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\u5f9e smolagents \u532f\u5165\u5de5\u5177\n\n@tool\ndef sql_engine(query: str) -&gt; str\uff1a\n    \"\"\"\n    \u5141\u8a31\u60a8\u5c0d\u8cc7\u6599\u8868\u57f7\u884c SQL \u67e5\u8a62\u3002\u8fd4\u56de\u7d50\u679c\u7684\u5b57\u4e32\u8868\u793a\u3002\n    \u8cc7\u6599\u8868\u540d\u70ba 'receipts'\u3002\u5176\u63cf\u8ff0\u5982\u4e0b\uff1a\n        \u6b04\u4f4d\uff1a\n        - receipt_id\uff1aINTEGER\n        - customer_name: VARCHAR(16)\n        - \u50f9\u683c\uff1aFLOAT\n        - \u5c0f\u8cbb\uff1aFLOAT\n\n    \u526f\u6a94\u540d\uff1a\n        query\uff1a\u8981\u57f7\u884c\u7684\u67e5\u8a62\u3002\u9019\u61c9\u8a72\u662f\u6b63\u78ba\u7684 SQL\u3002\n    \"\"\"\n    output = \"\"\n    with engine.connect() as con\uff1a\n        rows = con.execute(text(query))\n        for row in rows\uff1a\n            output += \"\\n\" + str(row)\n    \u8fd4\u56de\u8f38\u51fa<\/pre>\n\n\n\n<p>\u73fe\u5728\uff0c\u8b93\u6211\u5011\u5efa\u7acb\u4e00\u500b\u5229\u7528\u6b64\u5de5\u5177\u7684\u4ee3\u7406\u7a0b\u5f0f\u3002<\/p>\n\n\n\n<p>\u6211\u5011\u4f7f\u7528&nbsp;<code>CodeAgent<\/code>\uff0c\u9019\u662f smolagents \u7684\u4e3b\u8981\u4ee3\u7406\u7a0b\u5f0f\u985e\u5225\uff1a\u4e00\u500b\u4ee5\u7a0b\u5f0f\u78bc\u5beb\u5165\u52d5\u4f5c\u7684\u4ee3\u7406\u7a0b\u5f0f\uff0c\u53ef\u4ee5\u6839\u64da ReAct \u67b6\u69cb\u8fed\u4ee3\u4e4b\u524d\u7684\u8f38\u51fa\u3002<\/p>\n\n\n\n<p>\u6a21\u578b\u662f\u70ba\u4ee3\u7406\u7cfb\u7d71\u63d0\u4f9b\u52d5\u529b\u7684 LLM\u3002HfApiModel \u5141\u8a31\u60a8\u4f7f\u7528 HF \u7684 Inference API \u4f86\u547c\u53eb LLM\uff0c\u53ef\u4ee5\u900f\u904e Serverless \u6216 Dedicated endpoint\uff0c\u4f46\u60a8\u4e5f\u53ef\u4ee5\u4f7f\u7528\u4efb\u4f55\u5c08\u5c6c API\u3002<\/p>\n\n\n\n<p>\u8907\u88fd<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">from smolagents import CodeAgent, HfApiModel\n\nagent = CodeAgent(\n    tools=[sql_engine]\u3001\n    model=HfApiModel(\"meta-llama\/Meta-Llama-3.1-8B-Instruct\")\u3001\n)\nagent.run(\"Can you give me the name of the client who got the most expensive receipt?\")<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/huggingface.co\/docs\/smolagents\/examples\/text_to_sql#level-2-table-joins\" target=\"_blank\" rel=\"noopener\"><\/a>\u7b2c 2 \u7d1a\uff1a\u8868\u9023\u7d50<\/h3>\n\n\n\n<p>\u73fe\u5728\u8b93\u6211\u5011\u4f86\u589e\u52a0\u6311\u6230\u6027\uff01\u6211\u5011\u5e0c\u671b\u4ee3\u7406\u7a0b\u5f0f\u80fd\u8655\u7406\u8de8\u591a\u500b\u8cc7\u6599\u8868\u7684\u9023\u63a5\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\uff0c\u8b93\u6211\u5011\u88fd\u4f5c\u7b2c\u4e8c\u500b\u8868\uff0c\u8a18\u9304\u6bcf\u500b receipt_id \u7684\u670d\u52d9\u751f\u59d3\u540d\uff01<\/p>\n\n\n\n<p>\u8907\u88fd<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">table_name = \u300c\u670d\u52d9\u751f\u300d\n\u6536\u64da = Table(\n    table_name\u3001\n    metadata_obj\u3001\n    Column(\"receipt_id\", Integer, primary_key=True)\u3001\n    Column(\"waiter_name\", String(16), primary_key=True)\u3001\n)\nmetadata_obj.create_all(engine)\n\nrows = [\n    {\"receipt_id\"\uff1a1, \"waiter_name\"\uff1a\"Corey Johnson\"}\u3001\n    {\"receipt_id\"\uff1a2, \"waiter_name\"\uff1a\"Michael Watts\"}\u3001\n    {\"receipt_id\"\uff1a3, \"waiter_name\"\uff1a\"Michael Watts\"}\u3001\n    {\"receipt_id\"\uff1a4, \"waiter_name\"\uff1a\"Margaret James\"}\u3001\n]\nfor row in rows\uff1a\n    stmt = insert(receipts).values(**row)\n    with engine.begin() as connection\uff1a\n        cursor = connection.execute(stmt)<\/pre>\n\n\n\n<p>\u7531\u65bc\u6211\u5011\u8b8a\u66f4\u4e86\u8cc7\u6599\u8868\uff0c\u56e0\u6b64\u66f4\u65b0&nbsp;<code>SQLExecutorTool<\/code>&nbsp;\u8207\u6b64\u8868\u7684\u63cf\u8ff0\uff0c\u8b93 LLM \u80fd\u9069\u7576\u5730\u5229\u7528\u6b64\u8868\u7684\u8cc7\u8a0a\u3002<\/p>\n\n\n\n<p>\u8907\u88fd<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">updated_description = \"\"\"\"\u53ef\u8b93\u60a8\u5c0d\u8cc7\u6599\u8868\u57f7\u884c SQL \u67e5\u8a62\u3002\u8acb\u6ce8\u610f\uff0c\u6b64\u5de5\u5177\u7684\u8f38\u51fa\u662f\u57f7\u884c\u8f38\u51fa\u7684\u5b57\u4e32\u8868\u793a\u3002\n\u5b83\u53ef\u4ee5\u4f7f\u7528\u4e0b\u5217\u8cc7\u6599\u8868\uff1a\"\"\"\n\ninspector = inspect(engine)\nfor table in [\"receipts\", \"waiters\"]\uff1a\n    columns_info = [(col[\"name\"], col[\"type\"]) for col in inspector.get_columns(table)].\n\n    table_description = f \"Table '{table}':\\n\"\n\n    table_description += \"Columns:\\n\" + \"\\n\".join([f\" - {name}: {col_type}\" for name, col_type in columns_info])\n    updated_description += \"\\n\\n\" + table_description\n\nprint(updated_description)<\/pre>\n\n\n\n<p>\u7531\u65bc\u9019\u500b\u8acb\u6c42\u6bd4\u524d\u4e00\u500b\u96e3\u4e00\u4e9b\uff0c\u6211\u5011\u5c07\u5207\u63db LLM \u5f15\u64ce\uff0c\u4f7f\u7528\u529f\u80fd\u66f4\u5f37\u5927\u7684\u00a0<a href=\"https:\/\/huggingface.co\/Qwen\/Qwen2.5-Coder-32B-Instruct\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Qwen\/Qwen2.5-Coder-32B-Instruct<\/a>!<\/p>\n\n\n\n<p>\u8907\u88fd<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">sql_engine.description = updated_description\n\nagent = CodeAgent(\n    tools=[sql_engine]\u3001\n    model=HfApiModel(\"Qwen\/Qwen2.5-Coder-32B-Instruct\")\u3001\n)\n\nagent.run(\"Which waiter got more total money from tips?\")<\/pre>\n\n\n\n<p>\u5b83\u76f4\u63a5\u904b\u4f5c\uff01\u8a2d\u5b9a\u51fa\u5947\u7684\u7c21\u55ae\uff0c\u4e0d\u662f\u55ce\uff1f<\/p>\n\n\n\n<p>\u9019\u500b\u7bc4\u4f8b\u5c31\u5b8c\u6210\u4e86\uff01\u6211\u5011\u5df2\u7d93\u89f8\u53ca\u9019\u4e9b\u6982\u5ff5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5efa\u7acb\u65b0\u5de5\u5177\u3002<\/li>\n\n\n\n<li>\u66f4\u65b0\u5de5\u5177\u7684\u8aaa\u660e\u3002<\/li>\n\n\n\n<li>\u6539\u7528\u66f4\u5f37\u7684 LLM \u6709\u52a9\u65bc\u4ee3\u7406\u63a8\u7406\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u2705 \u73fe\u5728\u60a8\u53ef\u4ee5\u53bb\u5efa\u7acb\u60a8\u5922\u5bd0\u4ee5\u6c42\u7684 text-to-SQL \u7cfb\u7d71\uff01\u2728<\/p>","protected":false},"excerpt":{"rendered":"<p>In this tutorial, we\u2019ll see how to implement an agent that leverages SQL using&nbsp;smolagents. Let\u2019s start with the golden question: why not keep it simple and use a standard text-to-SQL pipeline? A standard text-to-sql pipeline is brittle, since the generated SQL query can be incorrect. Even worse, the query could be incorrect, but not raise&#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"doc_category":[10],"doc_tag":[],"class_list":["post-598","docs","type-docs","status-publish","hentry","doc_category-examples"],"year_month":"2026-04","word_count":879,"total_views":"4415","reactions":{"happy":"1","normal":"0","sad":"0"},"author_info":{"name":"smolagents","author_nicename":"wd-gstargmail-com","author_url":"https:\/\/smolagents.org\/zh_tw\/author\/wd-gstargmail-com\/"},"doc_category_info":[{"term_name":"Examples","term_url":"https:\/\/smolagents.org\/zh_tw\/docs-category\/examples\/"}],"doc_tag_info":[],"_links":{"self":[{"href":"https:\/\/smolagents.org\/zh_tw\/wp-json\/wp\/v2\/docs\/598","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/smolagents.org\/zh_tw\/wp-json\/wp\/v2\/docs"}],"about":[{"href":"https:\/\/smolagents.org\/zh_tw\/wp-json\/wp\/v2\/types\/docs"}],"author":[{"embeddable":true,"href":"https:\/\/smolagents.org\/zh_tw\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/smolagents.org\/zh_tw\/wp-json\/wp\/v2\/comments?post=598"}],"version-history":[{"count":1,"href":"https:\/\/smolagents.org\/zh_tw\/wp-json\/wp\/v2\/docs\/598\/revisions"}],"predecessor-version":[{"id":599,"href":"https:\/\/smolagents.org\/zh_tw\/wp-json\/wp\/v2\/docs\/598\/revisions\/599"}],"wp:attachment":[{"href":"https:\/\/smolagents.org\/zh_tw\/wp-json\/wp\/v2\/media?parent=598"}],"wp:term":[{"taxonomy":"doc_category","embeddable":true,"href":"https:\/\/smolagents.org\/zh_tw\/wp-json\/wp\/v2\/doc_category?post=598"},{"taxonomy":"doc_tag","embeddable":true,"href":"https:\/\/smolagents.org\/zh_tw\/wp-json\/wp\/v2\/doc_tag?post=598"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}