An Example of Test-Driven Development, Part 3
Andy Leonard continues on with his series on TDD. This time he performs some refactoring on his solution.
2010-11-12 (first published: 2009-07-13)
10,645 reads
Andy Leonard
- Interests: SQL Server, Integration Services, Managing Technical Teams, Faith, Family, Farming.
An Example of Test-Driven Development, Part 2
In this next installment of his series on TDD, MVP Andy Leonard continues the development of his database.
2010-11-05 (first published: 2009-06-16)
16,652 reads
An Example of Test-Driven Development
Developing a database can be an trying experience, and it's ways good to see how someone else builds a design. In this new article, MVP Andy Leonard shows us how to build a database using test-driven development for a weather database.
2010-10-29 (first published: 2009-04-30)
28,393 reads
2010-09-20
3,069 reads
2010-09-13
2,985 reads
2010-09-07
3,222 reads
2010-08-30
2,934 reads
2010-08-25
2,987 reads
2010-08-19
3,315 reads
SSIS 101: Object Variables, ResultSets, and Foreach Loop Containers
SQL Server MVP and SSIS guru, Andy Leonard, discusses Integration Services and some of the tasks and containers that he uses quite often.
2010-02-05 (first published: 2008-08-21)
96,204 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