2015-07-14
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T-SQL
How to Get NULLs Horribly Wrong in SQL Server
NULLs in SQL are a mixed blessing. The Three-Valued Logic of SQL has its uses but can cause difficulties to anyone who assumes that NULL has a 'value'. It can make reports go horribly wrong in a number of alarming ways, as Robert Sheldon explains.
2015-07-14
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2015-07-13
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2015-07-08
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2015-07-06
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2015-07-01
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2015-06-30
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2015-06-24
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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 37What is returned when I run this code:
select bit_count(UserPermissions) as PermissionCount from dbo.UserPermission where UserID = 3;See possible answers