What are transaction isolation levels in databases?

What are transaction isolation levels in databases?

Transaction 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 offers a trade-off between performance and consistency.

What is the difference between Read Committed and Serializable?

Read Committed prevents dirty reads, meaning a transaction can only read committed data. Serializable, on the other hand, ensures complete isolation by making transactions appear as if they were executed one after the other.

When should I use Serializable isolation level?

Use Serializable when you need the highest level of data integrity and consistency, especially in critical financial applications.