Peter He


SQLServerCentral Article

CTE Performance

SQL Server 2005 brings a new feature to T-SQL with Common Table Expressions, which make it possible for more complex subquery expressions than in previous versions. Recursion is a common use and Peter He takes a look at how well these new structures perform.

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2008-03-14 (first published: )

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SQLServerCentral Article

SET ROWCOUNT and TVFs

SQL Server 2000 has table valued functions that are very useful in many ways. However when you try to limit results with the ROWCOUNT setting, you can end up with some strange results. Peter He brings us a comprehensive look at some of the unpredictable results that you can get and how to code around them.

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2005-12-21

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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;

See possible answers