What are SQL Isolation Levels (Read Committed, Repeatable Read, Serializable), and What Anomalies Do They Prevent?

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What are SQL Isolation Levels (Read Committed, Repeatable Read, Serializable), and What Anomalies Do They Prevent?

SQL isolation levels are predefined settings (such as Read Committed, Repeatable Read, and Serializable) that determine how strictly transactions are kept separate from each other, with each level preventing certain concurrency anomalies like dirty reads, non-repeatable reads, and phantom reads.

What Are Transaction Isolation Levels?

In database systems, an isolation level refers to the degree to which one transaction is isolated from the effects of other concurrent transactions.

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