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Dealing with Transaction Log Growth

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Introduction Relational databases are designed to track changes introduced to a database by data modification language (DML) commands. The fundamental reason for this construct is to ensure that changes are durable and that they can be rolled back reliably. The typical DML command used in SQL are INSERT, UPDATE and DELETE. When INSERT introduces new […]

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2022-06-13 (first published: )

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SQLServerCentral Editorial

Will Hosted Services Take Your Job?

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This week I was honored to be able to attend, and present a session at, SQLDay in Wroclaw Poland. I fell in love with Poland the very first time I attended this event, so I look forward to any time I can go again. This year, Pavel Potasinski presented the keynote: The Evolution of the […]

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2022-05-14

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SQLServerCentral Editorial

Virtual Events Are Here To Stay

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This week was the MVP Summit. As was the case for the last couple of years, the event was entirely virtual. We were shown a bunch of new and interesting things by Microsoft. We were able to talk to each other and to the engineers at Microsoft. I'm honored that I've been an MVP and […]

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2022-04-02

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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