Atomicity vs Consistentcy

You're right to ask that! Atomicity and Consistency in ACID are closely related but different. Let me clarify with a simple example.

Atomicity (A) vs. Consistency (C)

Imagine you're moving $10 from your piggy bank to your friend's piggy bank.

🔴 Atomicity (All or Nothing)

• If you take $10 out of your piggy bank, it must fully reach your friend's piggy bank.
• If something goes wrong in the middle (e.g., you drop the money), the whole action should be canceled—so you keep your $10.
• Either everything happens or nothing happens. No half-finished transactions!

🟢 Consistency (Rules Are Always Followed)

• The total money in the system must always make sense.
• If you had $50 and your friend had $20, after the transaction, the total should still be $70.
• The database should never break its own rules (e.g., no negative balances unless allowed, no lost money, etc.).

Key Difference

So Atomicity is about completeness, while Consistency is about correctness. ✅ Hope that clears it up! 😃