Transactions and ACID

Problem

You are a backend engineer building a banking application. Your tech lead explains that transferring money involves debiting one account and crediting another, and asks you what guarantees these steps execute successfully as a single unit or fail entirely. Write a query that outputs concept with the value: "ACID properties (Atomicity, Consistency, Isolation, Durability) guarantee database transactions are processed reliably."

Database Schema

This problem acts as a scratchpad. You will write your own DDL/DML or conceptual queries, so there is no predefined schema.

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Hint

Solution