Articles

External Article

Choosing hash distributed table vs. round-robin distributed table in Azure SQL DW Service

Designing databases to use distributed tables effectively will help you to achieve the storage and query processing benefits of the Azure SQL DW Service (SQL DW). In this article, Murshed Zaman explains the various Azure SQL Data Warehouse distributed table types, and offers guidance for choosing the type of distributed table to use and when to use it.

2015-08-31

2,130 reads

External Article

Database Documentation Survey

Documentation often gets left behind in software development, perhaps even more so when it comes to developing the database schema. How do you keep yours up-to-date? Do you even think you should?

2015-08-27 (first published: )

4,698 reads

External Article

Identify SQL Server Database Growth Rates

Unchecked SQL Server database growth can hurt the bottom line of organizations in the form of poor application performance and increased infrastructure costs. In this article, Marios Philippopoulos looks at whether there's an easy way to proactively obtain a recent list of the fastest-growing databases in a SQL Server instance using information captured by default in the database engine.

2015-08-26

3,923 reads

External Article

Deciding on a Primary Key in Oracle

Designing a system with primary keys in mind is not an easy task, and the solutions may not be the simplest. However the effort is well worth the time and trouble when you realize that it's the best way to prevent duplicate data - but how do you choose a primary key? David Fitzjarrell looks at several examples.

2015-08-25

4,312 reads

Blogs

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Forums

Can someone please explain what happens?

By skeleton567

I have mentioned this several times over several years.  Can someone please help me...

SELECT COUNT(DISTINCT) returns null when nothing is found instead of 0

By tim8w

SELECT COUNT(DISTINCT Component) AS Found FROM tblComponents WHERE(Component NOT LIKE '%[a-z]%') AND(LTRIM(RTRIM(Component)) = 'GM13622')...

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Question of the Day

Creating JSON III

In a SQL Server 2025 table, called Beer, I have this data: 

BeerIDBeerName
1Becks
2Fat Tire
3Mac n Jacks
4Alaskan Amber
8Kirin
I run this code: 
SELECT JSON_OBJECTAGG(
    BeerID: BeerName )
FROM beer;
What are the results?

See possible answers