Master Hibernate and JPA with Spring Boot in 100 Steps - Step 60 - Understanding Dirty, Phanthom, and Non-Repeatable Rea

The video tutorial explains three key database transaction concepts: dirty read, non-repeatable read, and phantom read. It provides examples to illustrate how these issues arise when transactions run in parallel. Dirty read occurs when a transaction reads uncommitted data from another transaction. Non-repeatable read happens when a transaction reads the same data twice and gets different results due to updates by another transaction. Phantom read involves getting different numbers of rows in repeated queries within a transaction. The tutorial concludes with a brief overview of these concepts and hints at discussing isolation levels in the next session.

What are the three small concepts related to transactions running in parallel?

How can the order of transaction execution affect the outcome in a database?

What happens to the balances of accounts A, B, and C if transaction one fails after updating account A?

Explain the concept of dirty read in the context of transactions.

Describe a scenario where a non-repeatable read might occur.

What is a phantom read and how does it differ from dirty read and non-repeatable read?

In what way do isolation levels in databases help to mitigate issues like dirty reads, non-repeatable reads, and phantom reads?