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SQL Server Migration and Upgrade

(This post written by Jon Biggs (t), one of our Senior DBAs) We are currently performing migrations with upgrade of multiple-instance SQL Servers to new servers. The migrations are...

2022-03-22

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Self-hosted integration runtime

V rámci svojho bootcampu (https://joyfulcraftsmen.com/bootcamp/) v Joyful Craftsmen, na ceste stať sa Data Engineerom, som sa často (rozumej takmer vždy) stretol s novými technológiami. Keďže jednou z bežných činnosti...

2022-04-04 (first published: )

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Flyway Mistakes

I have been doing some testing with Redgate’s Flyway Desktop as a new way of managing code for databases. However, just like Git, I appreciate clients, but I want...

2022-04-06 (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