What are the impacts of isolation levels?

What are the different isolation levels in databases?

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

How does each isolation level impact data consistency?

Higher isolation levels like Serializable provide better consistency but can lead to more locking and reduced concurrency.

Can you give an example of when to use Read Committed?

Read Committed is often used in applications where you want to avoid dirty reads but can tolerate non-repeatable reads, like in reporting systems.

What are the trade-offs of using Serializable?

Using Serializable ensures the highest level of consistency but can significantly impact performance due to increased locking and potential deadlocks.