What Changed Overnight

A medium Python interview practice problem on DataDriven. Write and execute real python code with instant feedback.

Domain

Python

Difficulty

medium

Seniority

L4

Problem

A migration ran overnight, and you have the table's columns from before it (`old_schema`) and after (`new_schema`), each a list of `{'name', 'type'}` dicts. Return which columns were added, which were removed, and which kept their name but changed type.

Summary

Schema from yesterday vs today. Something changed.

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