What are isolation levels in database transactions?

What are isolation levels in database transactions?

Isolation levels define how transaction integrity is visible to other transactions. They control the visibility of changes made by one transaction to others.

Can you explain the different types of isolation levels?

Sure! The main isolation levels are Read Uncommitted, Read Committed, Repeatable Read, and Serializable. Each level balances consistency and performance differently.

What is the impact of using a higher isolation level?

Higher isolation levels, like Serializable, provide more consistency but can lead to increased locking and reduced concurrency, potentially slowing down performance.

How do isolation levels affect concurrency?

Isolation levels affect concurrency by determining how transactions interact with each other. Lower levels allow more concurrency but can lead to issues like dirty reads.

Which isolation level is best for high-performance applications?

For high-performance applications, Read Committed is often preferred as it provides a good balance between consistency and concurrency.