What are some examples of transaction isolation issues?

What are some examples of transaction isolation issues?

Transaction isolation issues occur when multiple transactions interact in ways that lead to inconsistent data. For example, a 'dirty read' happens when one transaction reads data written by another uncommitted transaction.

Can you explain what a dirty read is?

Sure! A dirty read occurs when a transaction reads data that has been modified by another transaction that has not yet been committed. This can lead to inconsistencies if the first transaction is rolled back.

What about non-repeatable reads?

Non-repeatable reads happen when a transaction reads the same row twice and gets different values because another transaction modified the data in between those reads.

How can these issues be prevented?

These issues can be prevented by using different isolation levels, such as Serializable or Repeatable Read, which control how transactions interact with each other.