How to Merge Multiple Pandas DataFrames in One Step – A Quick Guide

Introduction

In a recent Python community, a user asked how to combine three aggregation result columns into a single table using Pandas.

Solution

The recommended approach is to merge the DataFrames sequentially because Pandas cannot merge three or more tables in a single call. The following code demonstrates the merge:

df = pd.merge(df1, df2, on="column_name1", how="left")

Apply the same pattern to add the third DataFrame, adjusting the column name as needed.

Conclusion

The method resolves the merging issue, and the author also shares best practices for asking technical questions, including providing sanitized sample data and clear code snippets.