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Speaking at Techorama 2023

I’m excited to announce I’ve been selected again as a speaker for Techorama 2023. Techorama is one of the biggest Microsoft-focused events in the European mainland, and it’s always...

2023-02-14

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Blog Post

The Baseline for Flyway

In my previous post, I set up the Flyway Desktop projects for SQL Server and PostgreSQL. I also added a table to each platform for development. In this post,...

2023-02-24 (first published: )

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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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