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SQLServerCentral Editorial

Poking the Bear

  • Editorial

If you're an experienced, knowledgeable, seasoned (I won't say old), SQL Server data professional, and you choose to use Trace Events (Profiler), more power to you. That's it. That's all I have to say. Do what you think best. I'm never, ever (again), going to second guess you. Further, my apologies for ever having done […]

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2022-12-10

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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