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Serving layers with a data lake

Data lakes typically have three layers: raw, cleaned, and presentation (also called bronze, silver, and gold if using the medallion architecture popularized by Databricks). I talk about this is...

2023-08-28 (first published: )

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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