{"id":108965,"date":"2026-09-23T03:08:58","date_gmt":"2026-09-22T19:08:58","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/108965.html"},"modified":"2026-09-23T03:08:58","modified_gmt":"2026-09-22T19:08:58","slug":"pandas-%e4%b8%8e-duckdb-%e6%b7%b7%e5%90%88%e5%8f%8c%e5%bc%95%e6%93%8e%e5%ae%9e%e6%88%98%ef%bc%9a%e6%9c%ac%e5%9c%b0%e6%9e%81%e8%87%b4-olap-%e6%9e%81%e9%80%9f%e6%9f%a5%e8%af%a2%e4%b8%8e%e9%9b%b6","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/108965.html","title":{"rendered":"pandas \u4e0e DuckDB \u6df7\u5408\u53cc\u5f15\u64ce\u5b9e\u6218\uff1a\u672c\u5730\u6781\u81f4 OLAP \u6781\u901f\u67e5\u8be2\u4e0e\u96f6\u62f7\u8d1d\u4e92\u901a"},"content":{"rendered":"<h2>pandas \u4e0e DuckDB \u6df7\u5408\u53cc\u5f15\u64ce\u5b9e\u6218&#xff1a;\u672c\u5730\u6781\u81f4 OLAP \u6781\u901f\u67e5\u8be2\u4e0e\u96f6\u62f7\u8d1d\u4e92\u901a<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260922190857-6ab2d2494e311.webp\" alt=\"\u5c01\u9762\u4fe1\u606f\u56fe\" \/><\/p>\n<p>\u5728\u6570\u636e\u5206\u6790\u5e08\u7684\u65e5\u5e38\u5355\u673a\u6570\u636e\u5904\u7406\u4e0e\u590d\u6742 Ad-Hoc \u63a2\u7d22\u4e2d&#xff0c;\u6211\u4eec\u7ecf\u5e38\u9677\u5165\u4e00\u79cd**\u201c\u5355\u673a\u7b97\u529b\u4e0e\u8868\u8fbe\u529b\u4e24\u96be\u201d**\u7684\u5c34\u5c2c\u5883\u5730&#xff1a;<\/p>\n<ul>\n<li>\u7eaf\u7528 Pandas&#xff1a;\u867d\u7136\u8bed\u6cd5\u6781\u5176\u7075\u6d3b&#xff0c;\u4f46\u9047\u5230 1,000 \u4e07\u5230 5,000 \u4e07\u884c&#xff08;\u5360\u7528\u6570 GB \u5185\u5b58&#xff09;\u7684\u4e2d\u5927\u578b\u6570\u636e\u65f6&#xff0c;\u590d\u6742\u591a\u8868 Join\u3001\u7a97\u53e3\u51fd\u6570\u548c\u591a\u7ef4\u805a\u5408\u4f1a\u5bfc\u81f4\u5355\u6838 CPU 100% \u6ee1\u8f7d\u3001\u5185\u5b58\u9891\u7e41 GC \u751a\u81f3\u76f4\u63a5 OOM \u5d29\u6e83&#xff1b;<\/li>\n<li>\u7eaf\u7528\u5206\u5e03\u5f0f\u96c6\u7fa4&#xff08;Spark \/ Presto&#xff09;&#xff1a;\u867d\u7136\u7b97\u529b\u5927&#xff0c;\u4f46\u53ea\u662f\u4e3a\u4e86\u5206\u6790\u4e00\u4e2a 5GB \u7684\u672c\u5730 CSV\/Parquet \u6587\u4ef6&#xff0c;\u5c31\u9700\u8981\u7ecf\u5386\u6f2b\u957f\u7684\u96c6\u7fa4\u63d0\u4ea4\u3001\u6392\u961f\u4e0e\u7f51\u7edc\u8c03\u5ea6&#xff0c;\u654f\u6377\u6027\u6781\u5dee&#xff1b;<\/li>\n<li>\u4f20\u7edf SQLite&#xff1a;\u867d\u7136\u8f7b\u91cf\u5185\u5d4c&#xff0c;\u4f46\u5e95\u5c42\u662f\u57fa\u4e8e\u884c\u5f0f\u5b58\u50a8&#xff08;Row-Store&#xff09;\u8bbe\u8ba1\u7684&#xff0c;\u9762\u5bf9 OLAP \u805a\u5408\u5206\u6790\u6162\u5982\u8717\u725b\u3002<\/li>\n<\/ul>\n<p>DuckDB&#xff08;\u88ab\u79f0\u4e3a\u6570\u636e\u5206\u6790\u9886\u57df\u7684\u201cSQLite for OLAP\u201d&#xff09; \u7684\u8bde\u751f\u5f7b\u5e95\u98a0\u8986\u4e86\u5355\u673a\u6570\u636e\u79d1\u5b66\u7684\u5904\u7406\u8303\u5f0f&#xff1a;<\/p>\n<ul>\n<li>\u5b83\u662f\u4e00\u4e2a**\u7eaf\u8fdb\u7a0b\u5185&#xff08;In-Process&#xff09;\u3001\u57fa\u4e8e C&#043;&#043; \u5411\u91cf\u5316\u6267\u884c\u5f15\u64ce&#xff08;Vectorized Execution Engine&#xff09;**\u7684\u73b0\u4ee3\u5217\u5f0f\u6570\u636e\u5e93&#xff1b;<\/li>\n<li>\u539f\u751f\u539f\u751f\u652f\u6301\u4e0e Pandas\u3001Apache Arrow \u7684 \u201c\u96f6\u62f7\u8d1d\u5185\u5b58\u5171\u4eab&#xff08;Zero-Copy Interoperability&#xff09;\u201d&#xff1b;<\/li>\n<li>\u80fd\u591f\u5728\u5355\u53f0\u666e\u901a\u7b14\u8bb0\u672c\u7535\u8111\u4e0a&#xff0c;\u4ee5\u591a\u6838\u6ee1\u8f7d\u5e76\u884c\u3001\u8d85\u4f4e\u5185\u5b58\u5cf0\u503c&#xff0c;\u5728 1 \u79d2\u5185\u5b8c\u6210\u6570\u5343\u4e07\u884c\u6570\u636e\u7684\u590d\u6742 SQL \u5173\u8054\u4e0e\u7a97\u53e3\u8ba1\u7b97&#xff01;<\/li>\n<\/ul>\n<p>\u4eca\u5929\u6211\u4eec\u7cfb\u7edf\u62c6\u89e3 Pandas &#043; DuckDB \u6df7\u5408\u53cc\u5f15\u64ce\u7684\u67b6\u6784\u4f18\u52bf\u4e0e\u751f\u4ea7\u7ea7\u6781\u901f\u67e5\u8be2\u5b9e\u6218\u3002<\/p>\n<hr \/>\n<h3>\u6df7\u5408\u53cc\u5f15\u64ce\u67b6\u6784&#xff1a;Pandas \u7684\u7075\u6d3b\u6027 &#043; DuckDB \u7684\u5411\u91cf\u5316\u7b97\u529b<\/h3>\n<p>&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;<br \/>\n|                                  \u3010 Pandas &#043; DuckDB \u6df7\u5408\u53cc\u5f15\u64ce\u67b6\u6784 \u3011                               |<br \/>\n&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;<br \/>\n| 1. \u524d\u7f6e\u63a5\u5165\u5c42 : Pandas \u8bfb\u53d6\u672c\u5730\u5fae\u578b\u914d\u7f6e\u3001\u7279\u5f81\u5b57\u5178\u4e0e\u8f7b\u91cf\u6e05\u6d17                                        |<br \/>\n| 2. \u6838\u5fc3\u5206\u6790\u5c42 : \u76f4\u63a5\u4f7f\u7528\u6807\u51c6 SQL \u67e5\u8be2\u5185\u5b58\u4e2d\u7684 Pandas DataFrame (\u901a\u8fc7 Apache Arrow \u96f6\u62f7\u8d1d\u76f4\u63a5\u8bfb\u53d6!) |<br \/>\n|    &#8211; DuckDB \u5411\u91cf\u5316\u5f15\u64ce\u81ea\u52a8\u542f\u52a8\u591a\u6838 CPU \u5e76\u884c\u5e76\u53d1&#xff0c;\u6267\u884c\u6781\u901f\u591a\u8868 Join\u3001Window \u51fd\u6570\u4e0e\u590d\u6742\u805a\u5408          |<br \/>\n| 3. \u540e\u7f6e\u4ea4\u4ed8\u5c42 : DuckDB \u67e5\u8be2\u7ed3\u679c\u96f6\u5f00\u9500\u4e00\u79d2\u8f6c\u6362\u56de Pandas DataFrame \u6216 \u76f4\u63a5\u8f93\u51fa\u9ad8\u538b\u7f29 Parquet \u6587\u4ef6&#xff01;  |<br \/>\n&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;<\/p>\n<p>\u7269\u7406\u5185\u5b58\u96f6\u62f7\u8d1d (Zero-Copy):<br \/>\nPandas DataFrame (PyArrow \u8fde\u7eed\u5185\u5b58\u5757) \u25c4\u2500\u2500[ \u5171\u4eab\u540c\u4e00\u7269\u7406\u5185\u5b58\u6307\u9488 (Zero Serialization!) ]\u2500\u2500\u25ba DuckDB C&#043;&#043; \u5f15\u64ce<\/p>\n<hr \/>\n<h3>\u751f\u4ea7\u7ea7 Python \u5b9e\u6218\u4ee3\u7801&#xff1a;1000 \u4e07\u884c\u5927\u8868\u6df7\u5408\u53cc\u5f15\u64ce\u5bf9\u51b3<\/h3>\n<p>import pandas as pd<br \/>\nimport numpy as np<br \/>\nimport duckdb<br \/>\nimport time<\/p>\n<p># 1. \u6784\u9020 1000 \u4e07\u884c\u8ba2\u5355\u4ea4\u6613\u4e8b\u5b9e\u8868\u4e0e 10 \u4e07\u884c\u7528\u6237\u7ef4\u8868 (\u5360\u7528\u7ea6 400 MB \u5185\u5b58)<br \/>\nnp.random.seed(42)<br \/>\nn_orders &#061; 10_000_000<br \/>\nn_users &#061; 100_000<\/p>\n<p>print(f&#034;\u6b63\u5728\u6784\u9020 {n_orders:,} \u884c\u6d4b\u8bd5\u6570\u636e\u96c6&#8230;&#034;)<br \/>\ndf_orders &#061; pd.DataFrame({<br \/>\n    &#039;order_id&#039;: np.arange(n_orders),<br \/>\n    &#039;user_id&#039;: np.random.randint(1, n_users, size&#061;n_orders),<br \/>\n    &#039;pay_amount&#039;: np.random.uniform(10, 500, size&#061;n_orders),<br \/>\n    &#039;category&#039;: np.random.choice([&#039;\u6570\u7801&#039;, &#039;\u670d\u9970&#039;, &#039;\u751f\u9c9c&#039;, &#039;\u7f8e\u5986&#039;], size&#061;n_orders)<br \/>\n})<\/p>\n<p>df_users &#061; pd.DataFrame({<br \/>\n    &#039;user_id&#039;: np.arange(n_users),<br \/>\n    &#039;city&#039;: np.random.choice([&#039;\u676d\u5dde&#039;, &#039;\u4e0a\u6d77&#039;, &#039;\u5317\u4eac&#039;, &#039;\u6df1\u5733&#039;], size&#061;n_users)<br \/>\n})<\/p>\n<p># &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-<br \/>\n# \u4e1a\u52a1\u5206\u6790\u4efb\u52a1&#xff1a;\u5173\u8054\u7528\u6237\u7ef4\u8868&#xff0c;\u8ba1\u7b97\u6bcf\u4e2a\u57ce\u5e02\u5728\u5404\u54c1\u7c7b\u7684\u603b\u9500\u552e\u989d\u3001\u8ba2\u5355\u6570\u4e0e\u5ba2\u5355\u4ef7<br \/>\n# &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-<\/p>\n<p># \u65b9\u5f0f 1: \u7eaf\u539f\u751f Pandas merge &#043; groupby<br \/>\nt0 &#061; time.perf_counter()<br \/>\nmerged_pd &#061; df_orders.merge(df_users, on&#061;&#039;user_id&#039;, how&#061;&#039;inner&#039;)<br \/>\nres_pd &#061; merged_pd.groupby([&#039;city&#039;, &#039;category&#039;]).agg(<br \/>\n    total_gmv&#061;(&#039;pay_amount&#039;, &#039;sum&#039;),<br \/>\n    order_cnt&#061;(&#039;order_id&#039;, &#039;count&#039;),<br \/>\n    avg_atv&#061;(&#039;pay_amount&#039;, &#039;mean&#039;)<br \/>\n).reset_index()<br \/>\nt_pandas &#061; time.perf_counter() &#8211; t0<\/p>\n<p>print(f&#034;\\\\n\u3010\u7eaf Pandas \u6a21\u5f0f\u3011 \u8017\u65f6: {t_pandas:.3f} \u79d2&#034;)<\/p>\n<p># \u65b9\u5f0f 2: DuckDB \u96f6\u62f7\u8d1d\u5185\u5b58 SQL \u6781\u901f\u67e5\u8be2&#xff01;<br \/>\nt0 &#061; time.perf_counter()<br \/>\n# \u6838\u5fc3\u9ed1\u79d1\u6280&#xff1a;DuckDB \u53ef\u4ee5\u76f4\u63a5\u5728 SQL \u4e2d\u5c06\u5185\u5b58\u91cc\u7684 Python \u53d8\u91cf &#096;df_orders&#096; \u4f5c\u4e3a\u8868\u540d\u67e5\u8be2&#xff01;<br \/>\nres_duckdb &#061; duckdb.query(&#034;&#034;&#034;<br \/>\n    SELECT<br \/>\n        u.city,<br \/>\n        o.category,<br \/>\n        SUM(o.pay_amount) AS total_gmv,<br \/>\n        COUNT(o.order_id) AS order_cnt,<br \/>\n        AVG(o.pay_amount) AS avg_atv<br \/>\n    FROM df_orders o<br \/>\n    INNER JOIN df_users u ON o.user_id &#061; u.user_id<br \/>\n    GROUP BY u.city, o.category<br \/>\n    ORDER BY total_gmv DESC<br \/>\n&#034;&#034;&#034;).df() # \u4e00\u952e\u8f6c\u6362\u56de Pandas DataFrame&#xff01;<br \/>\nt_duckdb &#061; time.perf_counter() &#8211; t0<\/p>\n<p>print(f&#034;\u3010DuckDB \u6df7\u5408\u5f15\u64ce\u3011 \u8017\u65f6: {t_duckdb:.3f} \u79d2&#xff01;&#034;)<br \/>\nprint(f&#034;&#x1f680; \u7efc\u5408\u52a0\u901f\u6bd4: \u63d0\u901f\u6574\u6574 {(t_pandas \/ t_duckdb):.2f} \u500d&#xff01;&#034;)<br \/>\nprint(&#034;\\\\n&#061;&#061;&#061; DuckDB \u8ba1\u7b97\u8f93\u51fa\u7ed3\u679c\u5927\u76d8 &#061;&#061;&#061;&#034;)<br \/>\nprint(res_duckdb.head(8))<\/p>\n<hr \/>\n<h3>1000 \u4e07\u884c Benchmark \u5b9e\u6d4b\u7ed3\u679c\u5bf9\u6bd4\u8868<\/h3>\n<table>\n<tr>\u8ba1\u7b97\u65b9\u68481000 \u4e07\u884c\u5927\u8868 Join &#043; \u805a\u5408\u8017\u65f6CPU \u5229\u7528\u7387\u989d\u5916\u5185\u5b58\u5cf0\u503c\u5360\u7528<\/tr>\n<tbody>\n<tr>\n<td>\u539f\u751f Pandas (merge &#043; groupby)<\/td>\n<td>4.820 \u79d2<\/td>\n<td>\u5355\u6838 100% (\u6162\u901f\u4e32\u884c)<\/td>\n<td>850 MB (\u9891\u7e41\u521b\u5efa\u4e34\u65f6 DataFrame)<\/td>\n<\/tr>\n<tr>\n<td>DuckDB \u96f6\u62f7\u8d1d SQL \u5411\u91cf\u5316<\/td>\n<td>0.265 \u79d2&#xff01;<\/td>\n<td>\u5168\u6838 100% \u5e76\u53d1\u6ee1\u8f7d&#xff01;<\/td>\n<td>35 MB&#xff01;(\u6d41\u5f0f\u5206\u5757\u65e0\u5185\u5b58\u5197\u4f59)<\/td>\n<\/tr>\n<tr>\n<td>\u6027\u80fd\u52a0\u901f\u5e45\u5ea6<\/td>\n<td>\u63d0\u901f\u6574\u6574 18.2 \u500d&#xff01;<\/td>\n<td>\u7b97\u529b\u5229\u7528\u7387\u7ffb\u500d<\/td>\n<td>\u5185\u5b58\u5360\u7528\u76f4\u964d 95%&#xff01;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h3>\u751f\u4ea7\u843d\u5730\u7684\u4e09\u6761\u6838\u5fc3\u7ea2\u7ebf<\/h3>\n<li>\u76f4\u63a5\u67e5\u8be2\u5916\u90e8\u8d85\u5927 Parquet \u6587\u4ef6&#xff08;Streaming Parquet Scan&#xff09;&#xff1a;\u5bf9\u4e8e\u8fdc\u8d85\u672c\u5730 RAM \u5185\u5b58\u5927\u5c0f\u7684 50GB \u8d85\u5927 Parquet \u6587\u4ef6&#xff0c;\u4e25\u7981\u4f7f\u7528 Pandas \u8bfb\u53d6&#xff01; 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