2026-05-22
501 reads
Alessandro Mortola
2025-12-12
245 reads
2025-09-10
1,920 reads
2025-02-28
420 reads
2024-10-14
535 reads
2024-05-08
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2024-02-19
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The Record That Never Existed (as a committed row)
Introduction According to the official documentation, the READ COMMITTED isolation level “specifies that statements cannot read data that has been modified but not committed by other transactions”. So, one could think that a record returned under this isolation level existed in the committed state at the time of reading. In this article, I am going […]
2021-10-01
2,169 reads
2021-09-29
731 reads
A Solution for the Bin Packing Problem
A detailed description of a technique for the the solution of the Bin Packing Problem, that involves a recursive CTE and Window functions
2020-05-14 (first published: 2020-04-23)
5,742 reads
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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 NULLWhat is returned when I run this code:
select bit_count(UserPermissions) as PermissionCount from dbo.UserPermission where UserID = 4;See possible answers