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SQLServerCentral Webinar Series #6: Gathering and Interpreting Server Metrics including SQL Monitor

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In this webinar, MVP and noted author, Grant Fritchey shows you how to better keep track of what is happening on your instances by gathering information on performance from SQL Monitor and then using that to interpret the impact on your databases. Dec 14, 2010.

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2010-12-14 (first published: )

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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