Since the title might be considered a bit vague, I don’t want you to wade through the article to figure it out. I will spare you the typical clickbait introduction, with me telling you what a foreign key constraint is, and why it and all the other constraint types provided by relational engines are useful. […]
2024-04-27
266 reads
2024-04-22
476 reads
Learn about disaster recovery and high availability options in SQL Server with details on the tradeoffs you make when choosing from Availability Groups, Log Shipping, Database Mirroring, and Replication.
2024-04-15
6,785 reads
2024-04-12
348 reads
Learn how it works and how to use the DENSE_RANK() function in your code.
2024-04-12
3,658 reads
2024-04-08
586 reads
I recently came back from a trip to Las Vegas. I was privileged to be able to take part in the very first Fabric Community Conference. It was a great event, well attended. BUT... It was in Las Vegas. I am not a fan. First of all, Vegas is just far too noisy for me. […]
2024-04-06
100 reads
In this article, learn how to use the PowerShell DSC to patch your SQL Server instances.
2024-04-05
5,554 reads
Learn how to optimize the size of your Power BI semantic models with the free Vertipaq Analyzer tool. Extra tips & tricks included.
2024-03-22
4,733 reads
Learn how to address SQL Server transactional replication issues with these easy-to-follow steps using T-SQL and SSMS to troubleshoot and fix issues.
2024-03-18
By Steve Jones
Redgate is a for-profit company. We look to make money by building and selling...
I’ve uploaded the slides for my Techorama session Microsoft Fabric for Dummies and my...
If you've ever loaded a 2 GB CSV into pandas just to run a...
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We create the following table and then insert some records in it:
create table t1 ( id int primary key, category char(1) not null, product varchar(50) ); insert into t1 values (1, 'A', 'Product 1'), (2, 'A', 'Product 2'), (3, 'A', 'Product 3'), (4, 'B', 'Product 4'), (5, 'B', 'Product 5');What happens if we execute the following query in both Sql Server and PostgreSQL?
select id,
category,
string_agg(product, ';')
over (partition by category order by id
rows between unbounded preceding and unbounded following) as stragg
from t1; See possible answers