I have experience with Microsoft SQL Server. This blog is my attempt to share my knowledge about what I learned from my day to day work.

Connecting Ruby 1.9.2 to Microsoft SQL Server on Windows

Ok, before I continue to next step, I really want to put down something about it. Especially about ‘how to...

2013-07-03

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

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Comments posted to this topic are about the item ORDER BY alias

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Comments posted to this topic are about the item AI Experience Gap that we...

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)