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Recursive Queries in SQL:1999 and SQL Server 2005

How many of you have written resursive queries in SQL? Or any language since school for that matter? Not many people write recusrive queries because of the complexity, the difficulty to understand how they work, and the chance for heap overflows. However, SQL Server 2005 implements Common Table Expressions and recursion in a way that is much easier to code and incorporates some safeguards. New author SQL Server MVP Frederic Brouard has written a fantastic article looking at resursive queries.

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Question of the Day

BIT_COUNT I

In SQL Server 2025, I have a table (dbo.UserPermission) that contains this data:

UserID  UserPermissions
15
23
37
What is returned when I run this code:
select bit_count(UserPermissions) as PermissionCount
from dbo.UserPermission
where UserID = 3;

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