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SQLPSX Release 1.6

I completed Release 1.6 of SQLPSX which adds support for SQL Authentication and addresses several issues. SQLPSX consists of 106 functions,...

2009-06-28

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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)

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