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SQLServerCentral Editorial

The Weather Outside Is Frightful

  • Editorial

Yeah, I know, holidays are over. It snowed about four inches overnight here and it's still coming down a little. You'll forgive me for having that song running through my head. Yesterday morning, before the storm started, we did a check through the house to make sure we were ready for a couple of days […]

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2025-01-11

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SQLServerCentral Editorial

Do As I Say, Not As I Do

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Yesterday morning I sat down to start a new project. Before I got started, I knew I needed to put this in source control. Now, the project was going to be in AWS, but, AWS has shut down their flavor of Git, CodeCommit. I decided to use GitHub instead, no big deal. Well, until I […]

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2024-12-14

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SQLServerCentral Editorial

It's The People

  • Editorial

Last week the 2024 PASS Data Community Summit conference was held in Seattle. 1,700 of my closest friends got together for a week of learning (well, technically it's a three day conference, but there are two days of pre-conference seminars) and sharing. I'm still exhausted a week later (although, old age and an aggressive travel […]

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2024-11-16

119 reads

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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;

See possible answers