David Klee is all around geek who loves data - including the platform it resides on, virtualizing it, improving performance, availability, and disaster recoverability, and data presentation and visualization. He frequently advises organizations on the techniques of migrating their business-critical physical SQL Servers to the VMware infrastructure in his day job as Solutions Architect. David speaks at many national SQL Saturday events and SQL Server User Group meetings, as well as writes technical columns on SQL Server and virtualization topics on various blogs.

He is on Twitter (https://twitter.com/kleegeek), LinkedIn (http://www.linkedin.com/in/davidaklee), and blogs frequently (http://www.davidklee.net).

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Blog Post

Data Platform SLAs

Database professionals of the world – I have a question. Has your organization defined service level agreements (SLAs) for your data estate? I’m talking specifically the Recovery Point Objective...

2023-10-11 (first published: )

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Blogs

A Last Minute Trip to the EU

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In Part 1, we saw how ‘Vamana’ represents vectors as nodes, connects them with...

Automated SQL Server Benchmarking with HammerDB and Docker: A Complete Testing Framework

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I’m excited to announce the release of a new open-source project that fully automates...

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Server-Level Table sizes

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ORDER BY alias

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Question of the Day

ORDER BY alias

There is a table tmp_tab: 

CREATE TABLE tmp_tab (
id int,
val int
);
INSERT INTO tmp_tab VALUES
(1, 1),
(2, NULL),
(3, 3),
(4, 4),
(5, 5);
You want to order the rows ids by the following expression: 
    ISNULL(val, id) + 1
Which of the following queries produces the expected ordering and why? (Select all correct)

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