External Article

Statistics in SQL: The Kruskal–Wallis Test

Before you report your conclusions about your data, have you checked whether your 'actionable' figures occurred by chance? The Kruskal-Wallis test is a safe way of determining whether samples come from the same population, because it is simple and doesn't rely on a normal distribution in the population. This allows you a measure of confidence that your results are 'significant'. Phil Factor explains how to do it.

External Article

The Basics of Good T-SQL Coding Style – Part 2: Defining Database Objects

Technical debt is a real problem in database development, where corners have been cut in the rush to keep to dates. The result may work but the problems are in the details: such things as inconsistent naming of objects, or of defining columns; sloppy use of data types, archaic syntax or obsolete system functions. With databases, technical debt is even harder to pay back. Robert Sheldon explains how and why you can get it right first time instead.

Blogs

ISACA AI Material/Exam Prep Discount (May 18 – June 30, 2026)

By

If you are considering any of the ISACA AI certs like the Advanced Artificial...

A Fabric solution can be very cost effective

By

Are you currently using Microsoft Fabric or considering migrating to it? If so, there...

Track SQL Server Configuration Changes Using the Error Log

By

Track SQL Server Configuration Changes Using the Error Log If you...

Read the latest Blogs

Forums

Alamat kontak resmi BCA KCP Buaran Raya Telp:0817866887

By Layanan BCA_24jam

WhatsApp:0817866887 Jl. Buaran Raya Blok A No. 100, RT.6/RW.dan 101, Wil, Kec. Duren Sawit,...

Alamat kontak resmi BCA KCP Taman Melati Telp:0817866887

By Layanan BCA 24 JAM

WhatsApp:0817866887 Gedung Taman Melati Margonda Jl. Margonda No.525 A, Pondok Cina, Kecamatan Beji, Kota...

SQL Server Showing Out of Space But Plenty of Drive Space

By AMCity

We have a SQL Server installed. We have a 500GB drive for the database....

Visit the forum

Question of the Day

Creating a JSON Document IV

I have this data in a table called dbo.NFLTeams

TeamID  TeamName       City             YearEstablished
------  --------       ----             ---------------
1       Cowboys        Dallas           1960
2       Eagles         Philadelphia     1933
3       Packers        Green Bay        1919
4       Chiefs         Kansas City      1960
5       49ers          San Francisco    1946
6       Broncos        Denver           1960
7       Seahawks       Seattle          1976
8       Patriots       New England      1960
If I run this code, how many rows are returned?
SELECT 
  YearEstablished,
  json_objectagg(city : TeamName)
FROM dbo.NFLTeams
GROUP BY  YearEstablished;

See possible answers