Sharad Nandwani


SQLServerCentral Article

Unique Identifier: Usage and Limitations

The Unique Identifier datatype in SQL Server has tremendous potential to solve many of the issues one finds with Identity fields, other primary keys, etc. However it also has some drawbacks and limitations. Author Sharad Nandwani looks at some of the pros and cons of this datatype.

(1)

You rated this post out of 5. Change rating

2004-06-24

14,030 reads

Blogs

PowerPoint to HTML with Claude AI

By

I had an idea for an animated view of a sales tool, and started...

Don’t Miss Out – SQL Server Query Tuning Fundamentals Starts Next Monday!

By

Next Monday, February 9, 2026, my one-day live online training SQL Server Query Tuning...

Monday Monitor Tips: SQL Auditing Preview

By

One of the features we advocates have been advocating for is a better way...

Read the latest Blogs

Forums

Databricks Data Intelligence Platform: Unlocking the GenAI Revolution

By Site Owners

Comments posted to this topic are about the item Databricks Data Intelligence Platform: Unlocking...

Storytelling with Data: Let's Practice!

By Site Owners

Comments posted to this topic are about the item Storytelling with Data: Let's Practice!

Fundamentals of Data Engineering: Plan and Build Robust Data Systems

By Site Owners

Comments posted to this topic are about the item Fundamentals of Data Engineering: Plan...

Visit the forum

Question of the Day

The Decoded Value

In SQL Server 2025, what is returned from this code:

DECLARE @message VARCHAR(50) = 'Hello SQL Server 2025!';
DECLARE @encoded VARCHAR(MAX);

SET @encoded = BASE64_ENCODE(CAST(@message AS VARBINARY(1000)));
SELECT BASE64_DECODE(@encoded) 

See possible answers