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Microsoft SQL Server Licensing For Dummies..

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Don’t let the above title fool you! Have you been confused on the Microsoft SQL Server Licensing requirements? Per Processor, Per CAL, Per Core, Per Socket, Per Node – Per haps (space intended :-), we should revisit the issue again, and try to offer some assistance as you go forward in making your purchasing decisions.

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2011-02-04

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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