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

Thoughts on the PASS Virtual Summit

Some thoughts on the PASS Virtual Summit this year: Clearly the in-person option wasn’t doable. Just too hard to know infection rate, local rules, employer travel guidelines, attendee and...

2020-07-31 (first published: )

219 reads

SQLServerCentral Article

A Pattern Based Approach to Masking Errors

A few years ago I had a requirement to allow both developers and customers to see rows from a table used to store error information while making sure that any PII, PCI or similar sensitive data was not displayed. The tolerance for “oops” was low! This article presents one way to solve the challenge by […]

★ ★ ★ ★ ★ ★ ★ ★ ★ ★

(1)

You rated this post out of 5. Change rating

2020-04-27

1,768 reads

Blog Post

Covid Thoughts, So Far

I’ve gathered a bunch of notes from conversations and time reflecting, thought I’d write them down to at least be able to look back at them once the storm...

2020-04-04

149 reads

Blog Post

SQLOrlando Update

We’ve cancelled our upcoming Meetups in April and May due the loss of our venue (due to corona virus worries) though we would have probably cancelled them anyway. Our...

2020-03-16

7 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