{"id":229,"date":"2023-01-06T18:15:54","date_gmt":"2023-01-03T19:05:57","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/pandas-merge-%e5%90%88%e5%b9%b6%e4%b8%a4%e4%b8%aadataframe%e5%af%b9%e8%b1%a1\/"},"modified":"2025-08-01T02:41:08","modified_gmt":"2025-07-31T18:41:08","slug":"pandas-merge-%e5%90%88%e5%b9%b6%e4%b8%a4%e4%b8%aadataframe%e5%af%b9%e8%b1%a1","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/pandas-merge-%e5%90%88%e5%b9%b6%e4%b8%a4%e4%b8%aadataframe%e5%af%b9%e8%b1%a1\/","title":{"rendered":"Pandas merge() \u6559\u7a0b\uff1a\u9ad8\u6548\u5408\u5e76DataFrame\u6570\u636e\uff0c\u63d0\u5347\u6570\u636e\u5206\u6790\u6548\u7387"},"content":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300aPandas merge() &#8211; \u5408\u5e76\u4e24\u4e2aDataFrame\u5bf9\u8c61\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51711\u90e8\u5206\uff09\u3002<\/p>\n<p>Pandas \u7684 <code>merge()<\/code> \u51fd\u6570\u7528\u4e8e\u6267\u884c\u4e24\u4e2a DataFrame \u5bf9\u8c61\u7684\u6570\u636e\u5e93\u6837\u5f0f\u8fde\u63a5\u64cd\u4f5c\u3002\u8fde\u63a5\u53ef\u4ee5\u6839\u636e\u5217\u6216\u7d22\u5f15\u8fdb\u884c\u3002\u82e5\u901a\u8fc7\u5217\u8fdb\u884c\u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u7d22\u5f15\u3002\u8be5\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684 DataFrame \u5bf9\u8c61\uff0c\u539f\u59cb\u7684 DataFrame \u5bf9\u8c61\u4fdd\u6301\u4e0d\u53d8\u3002<\/p>\n<h2>Pandas \u7684 DataFrame merge() \u51fd\u6570\u8bed\u6cd5<\/h2>\n<p><code>merge()<\/code> \u51fd\u6570\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre class=\"post-pre\"><code>def merge(\r\n    self,\r\n    right,\r\n    how=\"inner\",\r\n    on=None,\r\n    left_on=None,\r\n    right_on=None,\r\n    left_index=False,\r\n    right_index=False,\r\n    sort=False,\r\n    suffixes=(\"_x\", \"_y\"),\r\n    copy=True,\r\n    indicator=False,\r\n    validate=None,\r\n)<\/code><\/pre>\n<ul>\n<li><code>right<\/code>: \u8981\u4e0e\u6e90 DataFrame \u5408\u5e76\u7684\u53e6\u4e00\u4e2a DataFrame\u3002<\/li>\n<li><code>how<\/code>: {\u2018left\u2019, \u2018right\u2019, \u2018outer\u2019, \u2018inner\u2019}\uff0c\u9ed8\u8ba4\u4e3a \u2018inner\u2019\u3002\u8fd9\u662f\u5b9a\u4e49\u5408\u5e76\u64cd\u4f5c\u7c7b\u578b\u6700\u91cd\u8981\u7684\u53c2\u6570\u3002\u5b83\u4eec\u7c7b\u4f3c\u4e8e SQL \u4e2d\u7684\u5de6\u5916\u8fde\u63a5\u3001\u53f3\u5916\u8fde\u63a5\u3001\u5168\u5916\u8fde\u63a5\u548c\u5185\u8fde\u63a5\u3002<\/li>\n<li><code>on<\/code>: \u7528\u4e8e\u8fde\u63a5\u7684\u5217\u540d\u6216\u7d22\u5f15\u7ea7\u522b\u540d\u79f0\u3002\u8fd9\u4e9b\u5217\u5fc5\u987b\u540c\u65f6\u5b58\u5728\u4e8e\u4e24\u4e2a DataFrame \u4e2d\u3002\u5982\u679c\u672a\u63d0\u4f9b\uff0c\u5219\u4f7f\u7528\u4e24\u4e2a DataFrame \u4e2d\u5217\u7684\u4ea4\u96c6\u3002<\/li>\n<li><code>left_on<\/code>: \u5de6\u4fa7 DataFrame \u4e2d\u7528\u4e8e\u8fde\u63a5\u7684\u5217\u540d\u6216\u7d22\u5f15\u7ea7\u522b\u540d\u79f0\u3002<\/li>\n<li><code>right_on<\/code>: \u53f3\u4fa7 DataFrame \u4e2d\u7528\u4e8e\u8fde\u63a5\u7684\u5217\u540d\u6216\u7d22\u5f15\u7ea7\u522b\u540d\u79f0\u3002<\/li>\n<li><code>left_index<\/code>: \u4f7f\u7528\u5de6\u4fa7 DataFrame \u7684\u7d22\u5f15\u4f5c\u4e3a\u8fde\u63a5\u952e\u3002<\/li>\n<li><code>right_index<\/code>: \u4f7f\u7528\u53f3\u4fa7 DataFrame \u7684\u7d22\u5f15\u4f5c\u4e3a\u8fde\u63a5\u952e\u3002<\/li>\n<li><code>sort<\/code>: \u5728\u7ed3\u679c DataFrame \u4e2d\u6309\u5b57\u5178\u987a\u5e8f\u5bf9\u8fde\u63a5\u952e\u8fdb\u884c\u6392\u5e8f\u3002<\/li>\n<li><code>suffixes<\/code>: \u5206\u522b\u5e94\u7528\u4e8e\u5de6\u4fa7\u548c\u53f3\u4fa7\u91cd\u53e0\u5217\u540d\u7684\u540e\u7f00\u3002<\/li>\n<li><code>indicator<\/code>: \u5982\u679c\u4e3a True\uff0c\u5219\u5728\u8f93\u51fa DataFrame \u4e2d\u6dfb\u52a0\u4e00\u4e2a\u540d\u4e3a \u201c_merge\u201d \u7684\u5217\uff0c\u5176\u4e2d\u5305\u542b\u6bcf\u884c\u7684\u6765\u6e90\u4fe1\u606f\u3002<\/li>\n<li><code>validate<\/code>: \u7528\u4e8e\u9a8c\u8bc1\u5408\u5e76\u8fc7\u7a0b\u3002\u6709\u6548\u503c\u4e3a {\u201cone_to_one\u201d \u6216 \u201c1:1\u201d, \u201cone_to_many\u201d \u6216 \u201c1:m\u201d, \u201cmany_to_one\u201d \u6216 \u201cm:1\u201d, \u201cmany_to_many\u201d \u6216 \u201cm:m\u201d}\u3002<\/li>\n<\/ul>\n<h2>Pandas DataFrame merge() \u7684\u793a\u4f8b<\/h2>\n<p>\u8ba9\u6211\u4eec\u6765\u770b\u4e00\u4e9b\u5408\u5e76\u4e24\u4e2a DataFrame \u5bf9\u8c61\u7684\u4f8b\u5b50\u3002<\/p>\n<h3>\u9ed8\u8ba4\u5408\u5e76 &#8211; \u5185\u8fde\u63a5<\/h3>\n<pre class=\"post-pre\"><code>import pandas as pd\r\n\r\nd1 = {'Name': ['Pankaj', 'Meghna', 'Lisa'], 'Country': ['India', 'India', 'USA'], 'Role': ['CEO', 'CTO', 'CTO']}\r\n\r\ndf1 = pd.DataFrame(d1)\r\n\r\nprint('DataFrame 1:\\n', df1)\r\n\r\ndf2 = pd.DataFrame({'ID': [1, 2, 3], 'Name': ['Pankaj', 'Anupam', 'Amit']})\r\nprint('DataFrame 2:\\n', df2)\r\n\r\ndf_merged = df1.merge(df2)\r\nprint('Result:\\n', df_merged)<\/code><\/pre>\n<p>\u7ed3\u679c\uff1a<\/p>\n<pre class=\"post-pre\"><code>DataFrame 1:\r\n      Name Country Role\r\n0  Pankaj   India  CEO\r\n1  Meghna   India  CTO\r\n2    Lisa     USA  CTO\r\nDataFrame 2:\r\n    ID    Name\r\n0   1  Pankaj\r\n1   2  Anupam\r\n2   3    Amit\r\nResult:\r\n      Name Country Role  ID\r\n0  Pankaj   India  CEO   1<\/code><\/pre>\n<h3>2. \u4f7f\u7528\u5de6\u8fde\u63a5\u3001\u53f3\u8fde\u63a5\u548c\u5916\u8fde\u63a5\u5408\u5e76 DataFrame<\/h3>\n<pre class=\"post-pre\"><code>print('Result Left Join:\\n', df1.merge(df2, how='left'))\r\nprint('Result Right Join:\\n', df1.merge(df2, how='right'))\r\nprint('Result Outer Join:\\n', df1.merge(df2, how='outer'))<\/code><\/pre>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code>Result Left Join:\r\n      Name Country Role   ID\r\n0  Pankaj   India  CEO  1.0\r\n1  Meghna   India  CTO  NaN\r\n2    Lisa     USA  CTO  NaN\r\nResult Right Join:\r\n      Name Country Role  ID\r\n0  Pankaj   India  CEO   1\r\n1  Anupam     NaN  NaN   2\r\n2    Amit     NaN  NaN   3\r\nResult Outer Join:\r\n      Name Country Role   ID\r\n0  Pankaj   India  CEO  1.0\r\n1  Meghna   India  CTO  NaN\r\n2    Lisa     USA  CTO  NaN\r\n3  Anupam     NaN  NaN  2.0\r\n4    Amit     NaN  NaN  3.0<\/code><\/pre>\n<h3>3. \u5728\u7279\u5b9a\u5217\u4e0a\u5408\u5e76 DataFrame<\/h3>\n<pre class=\"post-pre\"><code>import pandas as pd\r\n\r\nd1 = {'Name': ['Pankaj', 'Meghna', 'Lisa'], 'ID': [1, 2, 3], 'Country': ['India', 'India', 'USA'],\r\n      'Role': ['CEO', 'CTO', 'CTO']}\r\ndf1 = pd.DataFrame(d1)\r\n\r\ndf2 = pd.DataFrame({'ID': [1, 2, 3], 'Name': ['Pankaj', 'Anupam', 'Amit']})\r\n\r\nprint(df1.merge(df2, on='ID'))\r\nprint(df1.merge(df2, on='Name'))<\/code><\/pre>\n<p>\u7ed3\u679c\uff1a<\/p>\n<pre class=\"post-pre\"><code>   Name_x  ID Country Role  Name_y\r\n0  Pankaj   1   India  CEO  Pankaj\r\n1  Meghna   2   India  CTO  Anupam\r\n2    Lisa   3     USA  CTO    Amit\r\n\r\n     Name  ID_x Country Role  ID_y\r\n0  Pankaj     1   India  CEO     1<\/code><\/pre>\n<h3>4. \u6307\u5b9a\u5408\u5e76 DataFrame \u5bf9\u8c61\u65f6\u7684\u5de6\u53f3\u5217<\/h3>\n<pre class=\"post-pre\"><code>import pandas as pd\r\n\r\nd1 = {'Name': ['Pankaj', 'Meghna', 'Lisa'], 'ID1': [1, 2, 3], 'Country': ['India', 'India', 'USA'],\r\n      'Role': ['CEO', 'CTO', 'CTO']}\r\ndf1 = pd.DataFrame(d1)\r\n\r\ndf2 = pd.DataFrame({'ID2': [1, 2, 3], 'Name': ['Pankaj', 'Anupam', 'Amit']})\r\n\r\nprint(df1.merge(df2))\r\n\r\nprint(df1.merge(df2, left_on='ID1', right_on='ID2'))<\/code><\/pre>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code>     Name  ID1 Country Role  ID2\r\n0  Pankaj    1   India  CEO    1\r\n\r\n   Name_x  ID1 Country Role  ID2  Name_y\r\n0  Pankaj    1   India  CEO    1  Pankaj\r\n1  Meghna    2   India  CTO    2  Anupam\r\n2    Lisa    3     USA  CTO    3    Amit<\/code><\/pre>\n<h3>5. \u4f7f\u7528\u7d22\u5f15\u4f5c\u4e3a\u5408\u5e76\u6570\u636e\u6846\u7684\u8fde\u63a5\u952e<\/h3>\n<pre class=\"post-pre\"><code>import pandas as pd\r\n\r\nd1 = {'Name': ['Pankaj', 'Meghna', 'Lisa'], 'Country': ['India', 'India', 'USA'], 'Role': ['CEO', 'CTO', 'CTO']}\r\ndf1 = pd.DataFrame(d1)\r\n\r\ndf2 = pd.DataFrame({'ID': [1, 2, 3], 'Name': ['Pankaj', 'Anupam', 'Amit']})\r\n\r\ndf_merged = df1.merge(df2)\r\nprint('Result Default Merge:\\n', df_merged)\r\n\r\ndf_merged = df1.merge(df2, left_index=True, right_index=True)\r\nprint('\\nResult Index Merge:\\n', df_merged)<\/code><\/pre>\n<p>\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<pre class=\"post-pre\"><code>Result Default Merge:\r\n      Name Country Role  ID\r\n0  Pankaj   India  CEO   1\r\n\r\nResult Index Merge:\r\n    Name_x Country Role  ID  Name_y\r\n0  Pankaj   India  CEO   1  Pankaj\r\n1  Meghna   India  CTO   2  Anupam\r\n2    Lisa     USA  CTO   3    Amit<\/code><\/pre>\n<h2>\u53c2\u8003\u8d44\u6599<\/h2>\n<ul>\n<li><a href=\"#\">Python Pandas \u6a21\u5757\u6559\u7a0b<\/a><\/li>\n<li><a href=\"#\">DataFrame merge() API \u6587\u6863<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300aPandas merge() &#8211; \u5408\u5e76\u4e24\u4e2aDataFrame\u5bf9\u8c61\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51711\u90e8\u5206\uff09 [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[737,875,273,32,876],"class_list":["post-229","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-dataframe","tag-merge","tag-pandas","tag-python","tag-876"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Pandas merge() \u6559\u7a0b\uff1a\u9ad8\u6548\u5408\u5e76DataFrame\u6570\u636e\uff0c\u63d0\u5347\u6570\u636e\u5206\u6790\u6548\u7387 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u6df1\u5165\u5b66\u4e60Pandas merge() \u51fd\u6570\uff0c\u638c\u63e1\u591a\u79cd\u6570\u636e\u5408\u5e76\u6280\u5de7\uff0c\u8f7b\u677e\u8fde\u63a5\u3001\u5408\u5e76\u4e24\u4e2a\u6216\u591a\u4e2aDataFrame\u5bf9\u8c61\u3002\u672c\u6559\u7a0b\u8be6\u7ec6\u8bb2\u89e3\u5185\u8fde\u63a5\u3001\u5de6\u8fde\u63a5\u3001\u53f3\u8fde\u63a5\u3001\u5168\u8fde\u63a5\u7b49\u64cd\u4f5c\uff0c\u52a9\u60a8\u9ad8\u6548\u5904\u7406\u6570\u636e\uff0c\u63d0\u5347Python\u6570\u636e\u5206\u6790\u80fd\u529b\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/pandas-merge-\u5408\u5e76\u4e24\u4e2adataframe\u5bf9\u8c61\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pandas merge() \u6559\u7a0b\uff1a\u9ad8\u6548\u5408\u5e76DataFrame\u6570\u636e\uff0c\u63d0\u5347\u6570\u636e\u5206\u6790\u6548\u7387\" \/>\n<meta property=\"og:description\" content=\"\u6df1\u5165\u5b66\u4e60Pandas merge() \u51fd\u6570\uff0c\u638c\u63e1\u591a\u79cd\u6570\u636e\u5408\u5e76\u6280\u5de7\uff0c\u8f7b\u677e\u8fde\u63a5\u3001\u5408\u5e76\u4e24\u4e2a\u6216\u591a\u4e2aDataFrame\u5bf9\u8c61\u3002\u672c\u6559\u7a0b\u8be6\u7ec6\u8bb2\u89e3\u5185\u8fde\u63a5\u3001\u5de6\u8fde\u63a5\u3001\u53f3\u8fde\u63a5\u3001\u5168\u8fde\u63a5\u7b49\u64cd\u4f5c\uff0c\u52a9\u60a8\u9ad8\u6548\u5904\u7406\u6570\u636e\uff0c\u63d0\u5347Python\u6570\u636e\u5206\u6790\u80fd\u529b\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/pandas-merge-\u5408\u5e76\u4e24\u4e2adataframe\u5bf9\u8c61\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-01-03T19:05:57+00:00\" \/>\n<meta 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