What are some examples of database consistency?

What are some examples of database consistency?

Database consistency ensures that data remains accurate and reliable. Examples include ACID properties, where transactions are atomic, consistent, isolated, and durable.

Can you explain ACID properties in more detail?

Sure! ACID stands for Atomicity, Consistency, Isolation, and Durability. Atomicity ensures that all parts of a transaction are completed successfully or none at all. Consistency ensures that a transaction brings the database from one valid state to another. Isolation ensures that transactions do not interfere with each other, and Durability guarantees that once a transaction is committed, it remains so even in the event of a system failure.

What happens if a database transaction fails?

If a transaction fails, the database will roll back to its previous state, ensuring that no partial changes are made. This is part of the atomicity property.

Are there any real-world examples of database consistency issues?

Yes, a common example is in banking systems where a failed transaction could lead to incorrect account balances. Ensuring consistency prevents such issues.