Articles

External Article

Database Design: A Point in Time Architecture

In most relational database implementations. Update and Delete commands destroy the data that was there prior to their issue. However, some systems require that no information is ever physically deleted from or updated in the database. In this article, Arthur Fuller presents a solution to this requirement in the form of a Point-in-Time architecture: a database design which allows a user to recreate an image of the database as it existed at any previous point in time, without destroying the current image.

2007-02-28

3,723 reads

Technical Article

Retrieving Data as XML from SQL Server

All the hype that once surrounded XML is finally starting to die down, and developers are really beginning to harness the power and flexibility of the language. XML is a data descriptive language that uses a set of user-defined tags to describe data in a hierarchically-structured format.

2007-02-23

3,672 reads

SQLServerCentral Article

Some Usages for XML

While SQL Server 2005 has greatly expanded the XML capabilities of the platform, many DBAs are still not familiar with or comfortable
with using XML in their coding. Yousef Ekhtiari brings us a new article that looks at a basic use of XML in inserting data into a table.

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2007-02-22

7,352 reads

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Question of the Day

The "ORDER BY" clause behavior

Let’s consider the following script that can be executed without any error on both SQL Sever and PostgreSQL. We define the table t1 in which we insert three records:

create table t1 (id int primary key, city varchar(50));

insert into t1 values (1, 'Rome'), (2, 'New York'), (3, NULL);
If we execute the following query, how will the records be sorted in both environments?
select city

from t1

order by city;

See possible answers