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?

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

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

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

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

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

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

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