Additional Articles


External Article

SQL and R

There is plenty that is novel and perhaps foreign to a new R user, but it's no reason to abandon your hard-earned SQL skills! In this article, Casimir Saternos explains that not only can you easily retrieve data from SQL Sources for analysis and visualisation in R, but you can also use SQL to create, clean, filter, query and otherwise manipulate datasets within R, using a wide choice of relational databases.

2015-10-08

6,620 reads

External Article

Automatic UNDO in Oracle

Automatic UNDO Management isn't voodoo or black magic, although it can seem that way when it isn't clearly understood. How does Oracle decide how many UNDO segments to create at startup, and what is the underlying goal of the process? David Fitzjarrell investigates.

2015-10-06

3,322 reads

External Article

Power Query Formula Language in Power BI Desktop

The Power Query Formula Language (PQFL) is a functional language that drives the Power BI transformations, and allows you to create mashup queries from scratch. In this article, Rob Sheldon demonstrates how to use it in Power BI Desktop to extract data from its source, filter rows, specify the columns, clean the data, and create visualisations.

2015-10-05

2,714 reads

External Article

How to Avoid Conditional JOINs in T-SQL

Relational databases go out of their way to execute SQL, however bad the crimes against Codd and relational theory within the query might be. The 'conditional join' can be executed, but at great cost. As always, it is much better to sit back and restate the problem in a set-based way - Dwain Camps explains.

2015-10-02

7,474 reads

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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