Andy Warren

I started my SQL journey here at SQLServerCentral as one of the founders, helping to build a place to share and learn that continues to thrive under the editorial guidance of my friend Steve Jones. I've done a lot of volunteer work over the years ranging from our local SQL group (oPASS, SQLOrlando) to serving on the Board of Directors of PASS to designing and building the framework of SQLSaturday (which has gone on to produce more than 1000 locally managed events since we started in 2007). These days I manage a DBA team, but over the years I've been a trainer, consultant, contractor, and DBA. I'm rarely present on social media, the best way to contact me is here, LinkedIn, or via email.

All authors

Blog Post

Notes on the 2021 PASS Summit

I attended the three main days this year and wrote notes as I went. As I sat down to type them up I started by going back to look...

2021-11-19 (first published: )

336 reads

Blog Post

Notes on SQLSaturday Orlando 2021

We held an in-person SQLSaturday here in Orlando last weekend (Oct 30th). We didn’t organize one last year, there was just too much risk and too much uncertainty, so...

2021-11-17 (first published: )

205 reads

Blog Post

SQLSaturday Orlando 2021

We’ve opened up registration and the call for speakers for SQLSaturday Orlando, to be held October 30th at the Orlando Marriott Lake Mary. In-person! We weren’t able to get...

2021-07-30 (first published: )

232 reads

Blog Post

SQLSaturday Orlando 2021

We’ve opened up registration and the call for speakers for SQLSaturday Orlando, to be held October 30th at the Orlando Marriott Lake Mary. In-person! We weren’t able to get...

2021-07-19

10 reads

Blog Post

Platforms for Events

in my last post I wrote about thinking of the tools as being a separate thing from the event. Not a complicated concept, but does it matter? Maybe. Let...

2021-01-28 (first published: )

185 reads

All authors

Blogs

The Book of Redgate: Profits

By

Redgate is a for-profit company. We look to make money by building and selling...

Session Materials for Techorama & DataGrillen 2026

By

I’ve uploaded the slides for my Techorama session Microsoft Fabric for Dummies and my...

Stop Using Pandas for Aggregations — Try DuckDB Instead

By

If you've ever loaded a 2 GB CSV into pandas just to run a...

Read the latest Blogs

Forums

Even When You Know What You're Doing, You Can Screw Up

By Grant Fritchey

Comments posted to this topic are about the item Even When You Know What...

The New Software Team

By Steve Jones - SSC Editor

Comments posted to this topic are about the item The New Software Team

Database Mail in SQL Server 2022

By Abdellateef Ibrahim

Comments posted to this topic are about the item Database Mail in SQL Server...

Visit the forum

Question of the Day

The string_agg function

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