Blog Post

What's in a name? (T-SQL Tuesday #152)

Foreword
This month’s invitation is from Deborah Melkin (b|t), about venting anything you want. So let’s start this rant.

There are only two hard things in Computer Science: cache invalidation and...

2022-07-29 (first published: )

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BIT_COUNT II

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Question of the Day

BIT_COUNT II

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

UserID  UserPermissions
15
23
37
4       NULL
What is returned when I run this code:
select bit_count(UserPermissions) as PermissionCount
from dbo.UserPermission
where UserID = 4;

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