Editorials

SQLServerCentral Editorial

Document yourself out of a job

Some organizations have policies in place to make sure that everything in their IT infrastructure is documented. There are runbooks, procedures, wikis, diagrams, charts, code comments, and more to make sure that knowledge is available if an employee leaves or when disaster strikes. Not only does the documentation exist, but it’s also organized and easy […]

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2022-04-09

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SQLServerCentral Editorial

Virtual Events Are Here To Stay

This week was the MVP Summit. As was the case for the last couple of years, the event was entirely virtual. We were shown a bunch of new and interesting things by Microsoft. We were able to talk to each other and to the engineers at Microsoft. I'm honored that I've been an MVP and […]

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2022-04-02

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Blogs

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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)

See possible answers