{"id":1932,"date":"2023-07-23T05:19:50","date_gmt":"2023-07-23T05:19:50","guid":{"rendered":"https:\/\/feellikelearning.com\/?p=1932"},"modified":"2023-07-23T05:20:46","modified_gmt":"2023-07-23T05:20:46","slug":"how-to-join-pandas-dataframes","status":"publish","type":"post","link":"https:\/\/feellikelearning.com\/index.php\/2023\/07\/23\/how-to-join-pandas-dataframes\/","title":{"rendered":"\u600e\u6837Join Pandas dataframes?"},"content":{"rendered":"\n<p>\u600e\u6837\u50cfSQL\u4e00\u6837\u628a\u4e24\u4e2a\u8868(Dataframe) join\u5728\u4e00\u8d77<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">select\n  df1.*,\n  df2.col3\nfrom\n  df1\nleft join\n  df2\non \n  df1.col1 = df2.col1<\/pre>\n\n\n\n<p>\u53ef\u4ee5\u7528dataframe\u91cc\u7684merge method<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import pandas as pd\n\n# Sample data in df1 and df2\ndata1 = {'col1': ['A', 'B', 'C'],\n         'col2': [100, 200, 300]}\ndf1 = pd.DataFrame(data1)\n\ndata2 = {'col1': ['A1', 'A2', 'A3'],\n         'col3': [150, 250, 350]}\ndf2 = pd.DataFrame(data2)\n\n# Perform a left join on \"symbol\" column\nresult_df = df1.merge(df2, on='col1', how='left')\n\nprint(result_df)\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u600e\u6837\u50cfSQL\u4e00\u6837\u628a\u4e24\u4e2a\u8868(Dataframe) join\u5728\u4e00\u8d77 \u53ef\u4ee5\u7528dataframe\u91cc\u7684merge method<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false},"categories":[1],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.10 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u600e\u6837Join Pandas dataframes? 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