{"id":1114729,"date":"2025-01-08T18:00:10","date_gmt":"2025-01-08T10:00:10","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1114729.html"},"modified":"2025-01-08T18:00:13","modified_gmt":"2025-01-08T10:00:13","slug":"python%e5%a6%82%e4%bd%95%e4%bb%8e%e6%96%87%e4%bb%b6%e4%b8%ad%e8%af%bb%e5%8f%96%e6%95%b0%e6%8d%ae%e5%ba%93","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1114729.html","title":{"rendered":"python\u5982\u4f55\u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e\u5e93"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/25075801\/b6632a0c-8c61-489e-b4dc-46efe49c4a6a.webp\" alt=\"python\u5982\u4f55\u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\" \/><\/p>\n<p><p> \u5f00\u5934\u6bb5\u843d:<\/p>\n<p><strong>Python\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\uff1a\u4f7f\u7528sqlite3\u6a21\u5757\u3001\u4f7f\u7528pandas\u5e93\u3001\u4f7f\u7528SQLAlchemy\u5e93<\/strong>\u3002\u8fd9\u91cc\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528sqlite3\u6a21\u5757\u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u5185\u5bb9\u3002<strong>sqlite3\u6a21\u5757\u662fPython\u5185\u7f6e\u7684\u6570\u636e\u5e93\u6a21\u5757<\/strong>\uff0c\u5b83\u652f\u6301SQLite\u6570\u636e\u5e93\uff0c\u662f\u8f7b\u91cf\u7ea7\u7684\u6570\u636e\u5e93\u7cfb\u7edf\uff0c\u5e76\u4e14\u5176\u6570\u636e\u5e93\u6587\u4ef6\u53ef\u4ee5\u76f4\u63a5\u5b58\u50a8\u5728\u78c1\u76d8\u4e0a\u3002\u901a\u8fc7\u4f7f\u7528sqlite3\u6a21\u5757\uff0c\u7528\u6237\u53ef\u4ee5\u65b9\u4fbf\u5730\u8fde\u63a5\u5230SQLite\u6570\u636e\u5e93\u6587\u4ef6\uff0c\u6267\u884cSQL\u67e5\u8be2\uff0c\u5e76\u8bfb\u53d6\u6570\u636e\u3002<\/p>\n<\/p>\n<hr>\n<p><h3>\u4e00\u3001\u4f7f\u7528sqlite3\u6a21\u5757\u8bfb\u53d6SQLite\u6570\u636e\u5e93\u6587\u4ef6<\/h3>\n<\/p>\n<p><h4>1.1 \u8fde\u63a5\u5230\u6570\u636e\u5e93\u6587\u4ef6<\/h4>\n<\/p>\n<p><p>\u9996\u5148\uff0c\u4f7f\u7528sqlite3\u6a21\u5757\u8fde\u63a5\u5230SQLite\u6570\u636e\u5e93\u6587\u4ef6\u3002\u53ef\u4ee5\u4f7f\u7528<code>sqlite3.connect()<\/code>\u65b9\u6cd5\u6765\u5efa\u7acb\u8fde\u63a5\uff0c\u8be5\u65b9\u6cd5\u63a5\u53d7\u6570\u636e\u5e93\u6587\u4ef6\u7684\u8def\u5f84\u4f5c\u4e3a\u53c2\u6570\u3002\u5982\u679c\u6570\u636e\u5e93\u6587\u4ef6\u5b58\u5728\uff0c\u5219\u5c06\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\uff0c\u5426\u5219\u5c06\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6570\u636e\u5e93\u6587\u4ef6\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import sqlite3<\/p>\n<p>def connect_to_database(db_file):<\/p>\n<p>    &quot;&quot;&quot;\u8fde\u63a5\u5230SQLite\u6570\u636e\u5e93\u6587\u4ef6&quot;&quot;&quot;<\/p>\n<p>    try:<\/p>\n<p>        conn = sqlite3.connect(db_file)<\/p>\n<p>        print(f&quot;\u6210\u529f\u8fde\u63a5\u5230\u6570\u636e\u5e93\uff1a{db_file}&quot;)<\/p>\n<p>        return conn<\/p>\n<p>    except sqlite3.Error as e:<\/p>\n<p>        print(f&quot;\u8fde\u63a5\u6570\u636e\u5e93\u65f6\u53d1\u751f\u9519\u8bef\uff1a{e}&quot;)<\/p>\n<p>        return None<\/p>\n<h2><strong>\u793a\u4f8b\u7528\u6cd5<\/strong><\/h2>\n<p>database_file = &#39;example.db&#39;<\/p>\n<p>conn = connect_to_database(database_file)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>1.2 \u6267\u884cSQL\u67e5\u8be2<\/h4>\n<\/p>\n<p><p>\u8fde\u63a5\u6210\u529f\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528<code>conn.cursor()<\/code>\u65b9\u6cd5\u521b\u5efa\u6e38\u6807\u5bf9\u8c61\uff0c\u5e76\u901a\u8fc7\u6e38\u6807\u5bf9\u8c61\u7684<code>execute()<\/code>\u65b9\u6cd5\u6267\u884cSQL\u67e5\u8be2\u3002\u8bfb\u53d6\u7ed3\u679c\u53ef\u4ee5\u4f7f\u7528<code>fetchall()<\/code>\u65b9\u6cd5\u83b7\u53d6\u6240\u6709\u884c\uff0c\u6216\u8005\u4f7f\u7528<code>fetchone()<\/code>\u65b9\u6cd5\u83b7\u53d6\u4e00\u884c\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">def execute_query(conn, query):<\/p>\n<p>    &quot;&quot;&quot;\u6267\u884cSQL\u67e5\u8be2\u5e76\u8fd4\u56de\u7ed3\u679c&quot;&quot;&quot;<\/p>\n<p>    try:<\/p>\n<p>        cursor = conn.cursor()<\/p>\n<p>        cursor.execute(query)<\/p>\n<p>        rows = cursor.fetchall()<\/p>\n<p>        return rows<\/p>\n<p>    except sqlite3.Error as e:<\/p>\n<p>        print(f&quot;\u6267\u884c\u67e5\u8be2\u65f6\u53d1\u751f\u9519\u8bef\uff1a{e}&quot;)<\/p>\n<p>        return None<\/p>\n<h2><strong>\u793a\u4f8b\u7528\u6cd5<\/strong><\/h2>\n<p>query = &#39;SELECT * FROM my_table&#39;<\/p>\n<p>rows = execute_query(conn, query)<\/p>\n<p>if rows:<\/p>\n<p>    for row in rows:<\/p>\n<p>        print(row)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>1.3 \u5173\u95ed\u6570\u636e\u5e93\u8fde\u63a5<\/h4>\n<\/p>\n<p><p>\u5b8c\u6210\u64cd\u4f5c\u540e\uff0c\u8bb0\u5f97\u5173\u95ed\u6570\u636e\u5e93\u8fde\u63a5\uff0c\u4ee5\u91ca\u653e\u8d44\u6e90\u3002\u53ef\u4ee5\u4f7f\u7528<code>conn.close()<\/code>\u65b9\u6cd5\u5173\u95ed\u8fde\u63a5\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">def close_connection(conn):<\/p>\n<p>    &quot;&quot;&quot;\u5173\u95ed\u6570\u636e\u5e93\u8fde\u63a5&quot;&quot;&quot;<\/p>\n<p>    try:<\/p>\n<p>        conn.close()<\/p>\n<p>        print(&quot;\u6570\u636e\u5e93\u8fde\u63a5\u5df2\u5173\u95ed&quot;)<\/p>\n<p>    except sqlite3.Error as e:<\/p>\n<p>        print(f&quot;\u5173\u95ed\u6570\u636e\u5e93\u8fde\u63a5\u65f6\u53d1\u751f\u9519\u8bef\uff1a{e}&quot;)<\/p>\n<h2><strong>\u793a\u4f8b\u7528\u6cd5<\/strong><\/h2>\n<p>close_connection(conn)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u4e8c\u3001\u4f7f\u7528pandas\u5e93\u8bfb\u53d6SQLite\u6570\u636e\u5e93\u6587\u4ef6<\/h3>\n<\/p>\n<p><h4>2.1 \u5b89\u88c5\u548c\u5bfc\u5165pandas\u5e93<\/h4>\n<\/p>\n<p><p>\u9996\u5148\uff0c\u9700\u8981\u786e\u4fdd\u5df2\u5b89\u88c5pandas\u5e93\u3002\u5982\u679c\u672a\u5b89\u88c5\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u8fdb\u884c\u5b89\u88c5\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-bash\">pip install pandas<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u7136\u540e\uff0c\u5728Python\u811a\u672c\u4e2d\u5bfc\u5165pandas\u5e93\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import pandas as pd<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>2.2 \u8bfb\u53d6\u6570\u636e\u5e93\u8868\u5230DataFrame<\/h4>\n<\/p>\n<p><p>\u53ef\u4ee5\u4f7f\u7528<code>pandas.read_sql_query()<\/code>\u51fd\u6570\u4eceSQLite\u6570\u636e\u5e93\u4e2d\u8bfb\u53d6\u6570\u636e\u3002\u8be5\u51fd\u6570\u63a5\u53d7SQL\u67e5\u8be2\u5b57\u7b26\u4e32\u548c\u6570\u636e\u5e93\u8fde\u63a5\u5bf9\u8c61\u4f5c\u4e3a\u53c2\u6570\uff0c\u5e76\u5c06\u67e5\u8be2\u7ed3\u679c\u52a0\u8f7d\u5230DataFrame\u4e2d\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">def read_table_to_dataframe(conn, query):<\/p>\n<p>    &quot;&quot;&quot;\u8bfb\u53d6\u6570\u636e\u5e93\u8868\u5230DataFrame&quot;&quot;&quot;<\/p>\n<p>    try:<\/p>\n<p>        df = pd.read_sql_query(query, conn)<\/p>\n<p>        return df<\/p>\n<p>    except Exception as e:<\/p>\n<p>        print(f&quot;\u8bfb\u53d6\u6570\u636e\u65f6\u53d1\u751f\u9519\u8bef\uff1a{e}&quot;)<\/p>\n<p>        return None<\/p>\n<h2><strong>\u793a\u4f8b\u7528\u6cd5<\/strong><\/h2>\n<p>query = &#39;SELECT * FROM my_table&#39;<\/p>\n<p>df = read_table_to_dataframe(conn, query)<\/p>\n<p>if df is not None:<\/p>\n<p>    print(df)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u4e09\u3001\u4f7f\u7528SQLAlchemy\u5e93\u8bfb\u53d6SQLite\u6570\u636e\u5e93\u6587\u4ef6<\/h3>\n<\/p>\n<p><h4>3.1 \u5b89\u88c5\u548c\u5bfc\u5165SQLAlchemy\u5e93<\/h4>\n<\/p>\n<p><p>\u9996\u5148\uff0c\u9700\u8981\u786e\u4fdd\u5df2\u5b89\u88c5SQLAlchemy\u5e93\u3002\u5982\u679c\u672a\u5b89\u88c5\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u8fdb\u884c\u5b89\u88c5\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-bash\">pip install SQLAlchemy<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u7136\u540e\uff0c\u5728Python\u811a\u672c\u4e2d\u5bfc\u5165SQLAlchemy\u5e93\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from sqlalchemy import create_engine<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>3.2 \u521b\u5efa\u6570\u636e\u5e93\u5f15\u64ce<\/h4>\n<\/p>\n<p><p>\u53ef\u4ee5\u4f7f\u7528<code>create_engine()<\/code>\u51fd\u6570\u521b\u5efa\u6570\u636e\u5e93\u5f15\u64ce\uff0c\u8be5\u51fd\u6570\u63a5\u53d7\u6570\u636e\u5e93URL\u4f5c\u4e3a\u53c2\u6570\u3002\u5bf9\u4e8eSQLite\u6570\u636e\u5e93\uff0cURL\u683c\u5f0f\u4e3a<code>sqlite:\/\/\/path_to_database_file<\/code>\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">def create_database_engine(db_file):<\/p>\n<p>    &quot;&quot;&quot;\u521b\u5efa\u6570\u636e\u5e93\u5f15\u64ce&quot;&quot;&quot;<\/p>\n<p>    try:<\/p>\n<p>        engine = create_engine(f&#39;sqlite:\/\/\/{db_file}&#39;)<\/p>\n<p>        print(f&quot;\u6210\u529f\u521b\u5efa\u6570\u636e\u5e93\u5f15\u64ce\uff1a{db_file}&quot;)<\/p>\n<p>        return engine<\/p>\n<p>    except Exception as e:<\/p>\n<p>        print(f&quot;\u521b\u5efa\u6570\u636e\u5e93\u5f15\u64ce\u65f6\u53d1\u751f\u9519\u8bef\uff1a{e}&quot;)<\/p>\n<p>        return None<\/p>\n<h2><strong>\u793a\u4f8b\u7528\u6cd5<\/strong><\/h2>\n<p>engine = create_database_engine(&#39;example.db&#39;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>3.3 \u6267\u884cSQL\u67e5\u8be2<\/h4>\n<\/p>\n<p><p>\u4f7f\u7528\u6570\u636e\u5e93\u5f15\u64ce\uff0c\u53ef\u4ee5\u901a\u8fc7<code>execute()<\/code>\u65b9\u6cd5\u6267\u884cSQL\u67e5\u8be2\uff0c\u5e76\u83b7\u53d6\u7ed3\u679c\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">def execute_query_with_engine(engine, query):<\/p>\n<p>    &quot;&quot;&quot;\u4f7f\u7528\u6570\u636e\u5e93\u5f15\u64ce\u6267\u884cSQL\u67e5\u8be2&quot;&quot;&quot;<\/p>\n<p>    try:<\/p>\n<p>        with engine.connect() as connection:<\/p>\n<p>            result = connection.execute(query)<\/p>\n<p>            rows = result.fetchall()<\/p>\n<p>            return rows<\/p>\n<p>    except Exception as e:<\/p>\n<p>        print(f&quot;\u6267\u884c\u67e5\u8be2\u65f6\u53d1\u751f\u9519\u8bef\uff1a{e}&quot;)<\/p>\n<p>        return None<\/p>\n<h2><strong>\u793a\u4f8b\u7528\u6cd5<\/strong><\/h2>\n<p>query = &#39;SELECT * FROM my_table&#39;<\/p>\n<p>rows = execute_query_with_engine(engine, query)<\/p>\n<p>if rows:<\/p>\n<p>    for row in rows:<\/p>\n<p>        print(row)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u56db\u3001\u603b\u7ed3<\/h3>\n<\/p>\n<p><p>\u7efc\u4e0a\u6240\u8ff0\uff0c<strong>Python\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e\u5e93<\/strong>\uff0c\u5305\u62ec\u4f7f\u7528sqlite3\u6a21\u5757\u3001\u4f7f\u7528pandas\u5e93\u548c\u4f7f\u7528SQLAlchemy\u5e93\u3002\u6bcf\u79cd\u65b9\u6cd5\u90fd\u6709\u5176\u4f18\u70b9\u548c\u9002\u7528\u573a\u666f\uff1a<\/p>\n<\/p>\n<ul>\n<li><strong>sqlite3\u6a21\u5757<\/strong>\uff1a\u9002\u7528\u4e8e\u8f7b\u91cf\u7ea7\u5e94\u7528\uff0c\u76f4\u63a5\u64cd\u4f5cSQLite\u6570\u636e\u5e93\uff0c\u7b80\u5355\u6613\u7528\u3002<\/li>\n<li><strong>pandas\u5e93<\/strong>\uff1a\u9002\u7528\u4e8e\u6570\u636e\u5206\u6790\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u5c06\u6570\u636e\u5e93\u6570\u636e\u52a0\u8f7d\u5230DataFrame\u4e2d\u8fdb\u884c\u5904\u7406\u3002<\/li>\n<li><strong>SQLAlchemy\u5e93<\/strong>\uff1a\u9002\u7528\u4e8e\u590d\u6742\u7684\u6570\u636e\u5e93\u64cd\u4f5c\uff0c\u652f\u6301\u591a\u79cd\u6570\u636e\u5e93\u7c7b\u578b\uff0c\u63d0\u4f9b\u4e86\u9762\u5411\u5bf9\u8c61\u7684\u6570\u636e\u5e93\u64cd\u4f5c\u63a5\u53e3\u3002<\/li>\n<\/ul>\n<p><p>\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\uff0c\u5e76\u8fdb\u884c\u540e\u7eed\u7684\u6570\u636e\u5904\u7406\u548c\u5206\u6790\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u5728Python\u4e2d\u8fde\u63a5\u5230\u6570\u636e\u5e93\u5e76\u8bfb\u53d6\u6570\u636e\uff1f<\/strong><br \/>\u53ef\u4ee5\u4f7f\u7528\u591a\u79cd\u5e93\u6765\u8fde\u63a5\u5230\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\u5e93\uff0c\u4f8b\u5982 <code>sqlite3<\/code> \u7528\u4e8eSQLite\u6570\u636e\u5e93\uff0c<code>pymysql<\/code> \u7528\u4e8eMySQL\u6570\u636e\u5e93\uff0c<code>psycopg2<\/code> \u7528\u4e8ePostgreSQL\u6570\u636e\u5e93\u7b49\u3002\u4e00\u822c\u6765\u8bf4\uff0c\u60a8\u9700\u8981\u5bfc\u5165\u76f8\u5e94\u7684\u5e93\uff0c\u5efa\u7acb\u6570\u636e\u5e93\u8fde\u63a5\uff0c\u6267\u884c\u67e5\u8be2\u8bed\u53e5\uff0c\u7136\u540e\u83b7\u53d6\u7ed3\u679c\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8eSQLite\uff0c\u53ef\u4ee5\u8fd9\u6837\u505a\uff1a  <\/p>\n<pre><code class=\"language-python\">import sqlite3\n\n# \u8fde\u63a5\u5230SQLite\u6570\u636e\u5e93\nconn = sqlite3.connect(&#39;example.db&#39;)\n\n# \u521b\u5efa\u4e00\u4e2a\u6e38\u6807\u5bf9\u8c61\ncursor = conn.cursor()\n\n# \u6267\u884c\u67e5\u8be2\ncursor.execute(&#39;SELECT * FROM your_table&#39;)\n\n# \u83b7\u53d6\u6240\u6709\u7ed3\u679c\nresults = cursor.fetchall()\n\n# \u5173\u95ed\u8fde\u63a5\nconn.close()\n<\/code><\/pre>\n<p><strong>\u5982\u4f55\u4ece\u6587\u4ef6\u4e2d\u5bfc\u5165\u6570\u636e\u5230\u6570\u636e\u5e93\uff1f<\/strong><br \/>\u53ef\u4ee5\u4f7f\u7528Python\u4e2d\u7684pandas\u5e93\u8f7b\u677e\u5730\u5c06\u6587\u4ef6\uff08\u5982CSV\u6216Excel\uff09\u4e2d\u7684\u6570\u636e\u5bfc\u5165\u5230\u6570\u636e\u5e93\u4e2d\u3002\u9996\u5148\uff0c\u60a8\u9700\u8981\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\uff0c\u7136\u540e\u4f7f\u7528\u6570\u636e\u5e93\u8fde\u63a5\u5c06\u6570\u636e\u5199\u5165\u6570\u636e\u5e93\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528pandas\u548cSQLAlchemy\u7684\u793a\u4f8b\uff1a  <\/p>\n<pre><code class=\"language-python\">import pandas as pd\nfrom sqlalchemy import create_engine\n\n# \u8bfb\u53d6CSV\u6587\u4ef6\ndata = pd.read_csv(&#39;data.csv&#39;)\n\n# \u521b\u5efa\u6570\u636e\u5e93\u8fde\u63a5\nengine = create_engine(&#39;sqlite:\/\/\/example.db&#39;)\n\n# \u5c06\u6570\u636e\u5199\u5165\u6570\u636e\u5e93\ndata.to_sql(&#39;your_table&#39;, con=engine, if_exists=&#39;replace&#39;, index=False)\n<\/code><\/pre>\n<p><strong>\u5728\u8bfb\u53d6\u6570\u636e\u5e93\u65f6\uff0c\u5982\u4f55\u5904\u7406\u5927\u6570\u636e\u96c6\u4ee5\u63d0\u9ad8\u6548\u7387\uff1f<\/strong><br \/>\u5f53\u5904\u7406\u8f83\u5927\u7684\u6570\u636e\u96c6\u65f6\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u6e38\u6807\u7684\u8fed\u4ee3\u65b9\u5f0f\u9010\u884c\u8bfb\u53d6\u6570\u636e\uff0c\u800c\u4e0d\u662f\u4e00\u6b21\u6027\u52a0\u8f7d\u6574\u4e2a\u6570\u636e\u96c6\u5230\u5185\u5b58\u4e2d\u3002\u8fd9\u6709\u52a9\u4e8e\u51cf\u5c11\u5185\u5b58\u4f7f\u7528\u5e76\u63d0\u9ad8\u6027\u80fd\u3002\u53ef\u4ee5\u4f7f\u7528<code>fetchmany(size)<\/code>\u65b9\u6cd5\u6765\u5206\u6279\u83b7\u53d6\u6570\u636e\uff0c\u4f8b\u5982\uff1a  <\/p>\n<pre><code class=\"language-python\"># \u5047\u8bbe\u5df2\u8fde\u63a5\u5230\u6570\u636e\u5e93\u5e76\u521b\u5efa\u6e38\u6807\nbatch_size = 100\nwhile True:\n    results = cursor.fetchmany(batch_size)\n    if not results:\n        break\n    for row in results:\n        print(row)  # \u5904\u7406\u6bcf\u4e00\u884c\u6570\u636e\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\u5f00\u5934\u6bb5\u843d: Python\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\uff1a\u4f7f\u7528sqlite3\u6a21\u5757\u3001\u4f7f\u7528pandas\u5e93\u3001\u4f7f\u7528S [&hellip;]","protected":false},"author":3,"featured_media":1114738,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1114729"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=1114729"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1114729\/revisions"}],"predecessor-version":[{"id":1114740,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1114729\/revisions\/1114740"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1114738"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1114729"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1114729"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1114729"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}