Why is transaction isolation important?

Can you explain why transaction isolation is important in databases?

Transaction isolation is crucial because it ensures that transactions are processed independently, preventing data inconsistencies.

What are the different levels of transaction isolation?

There are four main levels: Read Uncommitted, Read Committed, Repeatable Read, and Serializable, each offering different guarantees.

How does isolation affect performance?

Higher isolation levels can lead to reduced performance due to increased locking and blocking, but they enhance data integrity.

Can you give an example of a problem caused by low isolation?

Sure! A common issue is the 'dirty read,' where a transaction reads uncommitted changes from another transaction, leading to potential errors.