What are the different isolation levels in databases?

What are the different isolation levels in databases?

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

Can you explain Read Uncommitted?

Read Uncommitted allows transactions to read data that has been modified but not yet committed. This can lead to dirty reads.

What about Serializable?

Serializable is the strictest isolation level. It ensures complete isolation from other transactions, preventing phenomena like dirty reads, non-repeatable reads, and phantom reads.

Which isolation level is the most commonly used?

Read Committed is often the most commonly used isolation level as it provides a good balance between performance and data integrity.