Editorials

SQLServerCentral Editorial

The Leaves Are Changing, But Why?

I've recently moved house from Massachusetts to Oklahoma. Long story. Anyway, sitting in my new office looking out at the trees, some of the leaves are starting to change. Ah, Fall. Lovely Autumn colors... WAIT! Actually, something else is going on. Only a few trees are changing color. Word is, we've been a little dry […]

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2021-09-04

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SQLServerCentral Editorial

What to do with more free time

Many data professionals have begun working remotely over the past year and a half which translates to less time spent commuting. In my own case, I’ve been a remote worker for almost ten years, but before that I spent two hours on the road each day. This got me wondering what folks have done with […]

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2021-08-28

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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