Daniel Janik

Daniel Janik has been supporting SQL Server for 18 years as a DBA, developer, architect, and consultant. He spent six years at Microsoft Corporation supporting SQL Server as a Senior Premier Field Engineer (PFE) where he supported over 287 different clients with both reactive and proactive database needs. Daniel has spoken at several SQL Saturday events across the US and Caribbean and regularly speaks at PASS local chapters.

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Blogs

The Book of Redgate: Profits

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

Stop Using Pandas for Aggregations — Try DuckDB Instead

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

Understanding Fabric Ontology

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What problem is Fabric Ontology trying to solve? For years, most data conversations have...

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The New Software Team

By Steve Jones - SSC Editor

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Database Mail in SQL Server 2022

By Abdellateef Ibrahim

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The string_agg function

By Alessandro Mortola

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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;

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