Scripts

Technical Article

Return WeekNo (ISO 8601 standard)

In MS SQL, January 1 of any year defines the starting number for the week. The DATEPART(wk, 'Jan 1, xxxx') always return 1. However, a lot of reports Week No is actually based on ISO 8601 standard, that is January 1 of any year can be Week 53/52 or Week 1. (http://www.merlyn.demon.co.uk/weekinfo.htm#IDC)The Rule is as […]

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2005-06-14 (first published: )

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Technical Article

IsDateAHoliday UDF

This is a User Defined Function that returns a 1 if date is a holiday else, it returns a 0.The holidays are:New years Day, MLK Day, Presidents Day, Memorial Day, Independance Day, Labor Day, Columbus Day, Veterans Day, Christmas Eve and Christmas Day

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2005-06-13 (first published: )

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Technical Article

ufn_vbintohexstr

A function to convert varbinary to hex string. Have you every tried to deal with varbinary via T-SQL? Passwords and SIDs are of this datatype. In Query Analyzer this datatype displays as hex string but under the hood it is binary. Try concatenating a varbinary to a string in a print statement and you get […]

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2005-06-09 (first published: )

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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