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2020 Year in Review

Yeah, so…that was a hell of a year, wasn’t it?
Short-Form Reviews of Year 2020 Reviewer #1: 👎
Reviewer #2: ★✩✩✩✩, would not recommend
Best Laid Plans… The year started out really...

2021-01-04

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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