SQL Myth Busted 1: WITH (NOLOCK) Doesn’t Prevent Locking — Here’s Why!

Think you’ve mastered SQL?
It’s time to bust one of the most common myths: WITH (NOLOCK).

In this video, we’ll walk through:
🔹 How WITH (NOLOCK) really works
🔹 Why it allows dirty reads
🔹 A live demo with two SQL sessions showing uncommitted data being read
🔹 Why this can be dangerous in critical systems

Quick Demo Recap:

Session 1: Begin transaction, update data

Session 2: Read using WITH (NOLOCK) and still see uncommitted changes

Rollback in Session 1 proves the data was never truly committed

Key Takeaway:
WITH (NOLOCK) doesn’t prevent locking — it just ignores them, risking inaccurate results.

#SQL #DatabaseTips #NoLock #SQLMyths #DirtyReads

Видео SQL Myth Busted 1: WITH (NOLOCK) Doesn’t Prevent Locking — Here’s Why! канала Trio-S Software Consultancy Pvt Ltd