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Seldom Used Indexes

On occasion you may ask yourself if there are any under used indexes in your database.  If not you, then...

2012-03-26 (first published: )

2,433 reads

Blogs

Automated SQL Server Benchmarking with HammerDB and Docker: A Complete Testing Framework

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I’m excited to announce the release of a new open-source project that fully automates...

T-SQL Snapshot Backups on Availability Group Secondary Replicas

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One of my favourite features of SQL Server 2022 was the T-SQL Snapshot Backups....

The Book of Redgate: Hours

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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