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pandas Documentation

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pd.merge()

AI & DATA SCIENCE // pd-merge

Merge DataFrame or named Series objects with a database-style join.

Syntax

merged = pd.merge(df1, df2, on='key', how='inner')

Examples

Example 01Basic Usage
merged = pd.merge(df1, df2, on='key', how='inner')

Best Practices

  • Use vectorized operations over iterations (e.g. iterrows()) for performance.
  • Always verify memory usage when loading large files.