SQLServerCentral Editorial

Deceptive Visualizations

I'm sure there are plenty of examples, but I've seen deceptive data visualizations far too often in mass media. I don't often watch the news, but at times I've been at the gym, saw a graph on a television, and been a little surprised. The issue that bothered me is similar to what's discussed in […]

SQLServerCentral Article

Conditional DELETE and INSERT in PostgreSQL

Introduction We are comfortable with inserting/deleting record(s) into/from a table. But we sometimes get confused when we need to insert or delete records conditionally from a table. Let us look at an example. Example scenario Suppose we have a table, called ALL_EMPLOYEES, which contains all employees' information who are working or had ever worked for […]

SQLServerCentral Article

Handling Row-level Errors in ADF Data Flows

If you are working with ADF (Azure Data Factory) data flows, then you may have noticed there was a new feature released in November 2020, which is useful to capture any error while inserting/updating the records in a SQL database. This article will describe how to setup the error row handling feature and why it's […]

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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;

See possible answers