Alias

I have an application that has a specified database connection that I either can't or don't want to change. However, I need to move the database to a new server. How can I do this easily without breaking other things that maybe using this connection and/or database?

2008-11-18

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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