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Deploying SQL Server Automatically

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I've had to install SQL Server many times over the years. Often it has felt that most of these installs were one-offs, a dev server, a new QA instance, a production server for a brand new application. A few times I've had to recover from disaster, including restoring master, but often, I just installed SQL […]

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2021-07-31

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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