Additional Articles


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.

2017-07-27

6,123 reads

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.

2017-07-25

5,860 reads

External Article

SQL Server User-Defined Functions

User-Defined Functions (UDFs) are an essential part of the database developers' armoury. They are extraordinarily versatile, but just because you can even use scalar UDFs in WHERE clauses, computed columns and check constraints doesn't mean that you should. Multi-statement UDFs come at a cost and it is good to understand all the restrictions and potential drawbacks. Phil Factor gives an overview of User-defined functions: their virtues, vices and their syntax.

2017-07-21

5,686 reads

External Article

Simple SQL: Attribute Splitting

If the design of a relational database is wrong, no amount of clever DML SQL will make it work well. Dr. Codd’s Information Principle is that you have, inside the entity tables, the columns that model the attributes of that entity. The columns contain scalar values. Tables that model relationships can have attributes, but they must have references to entities in the schema. You split those attributes at your peril. Joe Celko explains the basics.

2017-07-18

3,822 reads

Blogs

SQL Server 2025 RegEx and AI

By

One of the language changes in SQL Server 2025 that I’ve seen a lot...

T-SQL Tuesday #192: SQL Server 2025 Backup Changes

By

I hosted this month, but I decided to put my own entry in as...

Why Databases Still Fascinate Me

By

I get asked a lot about why or how I began working with databases...

Read the latest Blogs

Forums

Getting the Object Code

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Getting the Object Code

T-SQL in SQL Server 2025: Concatenating Strings

By Steve Jones - SSC Editor

Comments posted to this topic are about the item T-SQL in SQL Server 2025:...

Being Mindful of Design Time

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Being Mindful of Design Time

Visit the forum

Question of the Day

Getting the Object Code

What happens when I run this on SQL Server 2022 in the AdventureWorks2022 database?

SELECT OBJECT_DEFINITION (OBJECT_ID(N'dbo.uspGetBillofMaterials')) AS [Object Definition]; 
GO 

See possible answers