[Solved] A developer writes this SQL snippet to avoid dirty reads: SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;What is the error in this approach? | SQL

SQL - Transactions and Data Integrity

A developer writes this SQL snippet to avoid dirty reads:
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
What is the error in this approach?

AREAD UNCOMMITTED causes phantom reads, not dirty reads

BREAD UNCOMMITTED allows dirty reads, so it does not avoid them

CThe syntax is incorrect for setting isolation level

DThis isolation level causes deadlocks

Step-by-Step Solution

Solution:

Step 1: Understand READ UNCOMMITTED behavior
READ UNCOMMITTED allows dirty reads, meaning it does not prevent reading uncommitted data.
Step 2: Identify the developer's goal
The developer wants to avoid dirty reads, but this isolation level does not achieve that.
Final Answer:
READ UNCOMMITTED allows dirty reads, so it does not avoid them -> Option B
Quick Check:
READ UNCOMMITTED allows dirty reads [OK]

Quick Trick: READ UNCOMMITTED permits dirty reads, not prevents them [OK]

Common Mistakes:

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