Isolation Levels

Difficulty: Advanced

Question

Describe the 4 standard isolation levels and the problems they solve.

Answer

1. Read Uncommitted (none). 2. Read Committed (prevents Dirty Reads). 3. Repeatable Read (prevents Non-Repeatable Reads). 4. Serializable (prevents Phantom Reads).

Concepts covered

Read Uncommitted, Read Committed, Repeatable Read, Serializable, Dirty Read, Phantom Read