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Da Merge Types — Free Data Analytics Tutorial

Learn Da Merge Types in Data Analytics with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.

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TL;DR: Learn Da Merge Types in Data Analytics with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.

Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated Jul 14, 2026

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Da Merge Types in Data Analytics

Inner merge keeps only matching rows from both DataFrames.

Outer (full) merge keeps all rows from both DataFrames (fills missing with NaN).

Left merge keeps all rows from left DataFrame; matches right rows where available.

Right merge keeps all rows from right DataFrame; matches left rows where available.

Merge key can be column name, index, or a list of columns.

Da Merge Types — Syntax

# Basic merge: pd.merge(df1, df2, on='common_column', how='inner')
# Merge on different column names: pd.merge(df1, df2, left_on='col1', right_on='col2')

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