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Visualizing SQL

While I think SQL is interesting, I know some people struggle with the way the language work. Someone at work posted a link to this site: https://animatesql.com/ I think...

2022-05-25 (first published: )

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Azure Redis Commands

Now that we have created our Redis Cache lets connect to it. You can use the most common tool redis cli.exe https://redis.io/download or as I am going to do,...

2022-04-14

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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