What are the different isolation levels in databases?

What are the different isolation levels in databases?

In databases, isolation levels define how transaction integrity is visible to other transactions. The main levels are: 1. Read Uncommitted 2. Read Committed 3. Repeatable Read 4. Serializable.

Can you explain Read Committed in more detail?

Read Committed is an isolation level where a transaction can only read data that has been committed. This prevents dirty reads but allows non-repeatable reads.

What about Serializable? How does it work?

Serializable is the highest isolation level. It ensures complete isolation from other transactions, meaning transactions are executed in a way that they appear to be sequential.

Which isolation level is the most commonly used?

Read Committed is the most commonly used isolation level as it balances performance and data integrity.