Universal Product Codes: a Database Primer
An introduction to Universal Product Codes with code to help you use them in your database.
2013-02-28
6,627 reads
Uncategorized
Designing Databases for Rapid Resilience
As the volume of data increases, DBAs need to plan more actively for rapid restores in the event of failure. For this, the intelligent use of filegroups is important, particularly when the Enterprise Edition of SQL Server offers the hope of online restores. How, though, should you arrange your data on the different filegroups? What happenens if the primary filegroup gets corrupted? Why backup and restore indexes?
2012-11-13
2,996 reads
New feature in SQL Server 2012 - Sequence
A new feature in SQL Server 2012 is Sequence. A Sequence object provides functionality similar to Identity.
2012-10-22 (first published: 2012-09-11)
2,049 reads
2012-07-05 (first published: 2012-06-15)
942 reads
2012-06-05
2,014 reads
2011-11-07
2,034 reads
2011-10-31
2,222 reads
2011-06-23 (first published: 2011-06-20)
627 reads
2011-05-23
307 reads
No free lunch in the Orchard
Phil Factor finds much to admire in Microsoft's new Orchard application but is frustrated by a design decision that seems to limit its use to low-volume applications, with less stringent security requirements.
2010-11-08
154 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