What are transaction isolation levels?

Can you explain what transaction isolation levels are?

Sure! Transaction isolation levels define how transaction integrity is visible to other transactions. They help manage concurrency.

What are the different types of isolation levels?

There are four main isolation levels: Read Uncommitted, Read Committed, Repeatable Read, and Serializable.

What happens at each isolation level?

At Read Uncommitted, dirty reads can occur. Read Committed prevents dirty reads. Repeatable Read prevents non-repeatable reads, and Serializable ensures complete isolation.

Which isolation level is the best?

It depends on your application's needs. Serializable offers the highest isolation but can reduce performance. Choose based on your requirements.