Amazon finished private beta testing and has entered into public unlimited beta of its cloud database service named SimpleDB. SimpleDB is meant to be a simple to be accessed database in the cloud, and Amazon is offering limited access to it for free.

What I miss is the no more existing visual explorer. It disappeared in NB 6.1. It was possible with "Design Query" wizard to visualize table and connections between them. I never used it to actually design a query, but just to visualize the relations between tables.

JDbMonitor v1.1 is an effective tool to identify SQL queries that slows down your Java applications. No code change needed as it works as a JDBC 'proxy' driver. Similar to P6Spy, but comes with a Swing GUI to see detailed query execution timing.

One of the biggest mistakes of today's fledgling MySQL programmers is their field type definitions, also known as data type or column type. Many are too quick to set up their tables, flying through the different options without giving it much thought. The time you spend setting up your tables will save you from many headaches later on down the road.

Various options to distribute database backed caches and other application data that needs to be highly available but not necessarily be persisted in the database.

Last week I wrote an article called Why CouchDB Sucks, which many people correctly said should have been called "What CouchDB Sucks at Doing". Nearly everyone pointed out that it was not designed to do the things that I was mentioning in the article. This time around, I'd like to focus on some of the features about CouchDB that I think absolutely rock.

I just run into a nice blog post by Nail Martin ("Prototyping : New wine, old skins") where he shows how to abstract data access with db4o as the underlying persistence engine (Nail is a big fan of repositories and finders, updaters and basically any technique to abstract data access and easily Mock the data layer). Basic source code is included (C#) and a brief explanation on how to inject the repository against the IoC framework Unity.

In this blog I will try to describe my opinions about this release and also try to set the expectations right for anyone trying out MySQL 5.1 GA.

Altering your database schema to accommodate gay marriage can be easy or difficult depending on how smart you were when you originally set up your system to accommodate heterosexuality only. Let's begin.

With WSF/PHP Data Service library, you can convert a SQL query to a Data Service very easily in few steps. Here are the steps..

Our Mission * Create a database that will store our images. * Create a home page that retrieves all of the photos that are stored in our database. * Allow the user to upload photos. * Write some validation to ensure that the user enters a proper description and chooses an image * Use jQuery to allow the user to asynchronously update and delete specific photos.

How ofter were you asked by a client for a CSV (or excel) file with data from their app? I get asked that question quite often, so I wanted make the process as easy as possible. And guess what? You can create CSV files directly from MySQL with just one query!

When discussing the benefits and drawbacks of hibernate things like performance take the center stage. I think this is not apropriate. Performance is important, but it isn't so much different between Hibernate and JDBC. Hibernate can have a much bigger impact on your way to develop database centric software!

PremiumSoft just announced its first public release of Navicat for Oracle Full Versions supporting Mac OS X and Windows. It’s a tool for Oracle administration that allows users to create, edit databases, import/ export data, build report, create/run SQL queries, migrate databases and create reports.

Numerous examples from robots to bicycles have been offered as “easy” explanations of what OOP is. I’ve opted to show you how OOP works with a real-life example, for a programmer. By creating a MySQL CRUD class you can easily create, read, update and delete entries in any of your projects, regardless of how the database is designed.

MySQL, the most popular open source database, releases today, November 27, 2008, its version 5.1 GA (General Availability). Downloads are available for all operating systems.

Step by step to demonstrate how to do Point-in-time Recovery (Incremental Backup) in PostgreSQL

Data is huge! Literally speaking, that is. Management of data is complex, for a single application or for the enterprise. It's interesting to know that the approach to manage large chunks of data has changed very little over the years; technology has improved, but the method by which you apply the technology is still the same. This article will focus on data management; not the specifics, but a more general overview of available options.

Over the last three years I've had the opportunity to work on several PHP projects, some of them having grown rapidly and required to scale quickly. Three in particular have been a fantastic learning experience for me. Now I don't consider myself a total expert, but I thought I would share my experiences. Many PHP developers are self-taught, like I was, and are learning PHP to be able to create dynamic websites. Many haven't had studied or learned best practices for Object-Oriented Programming (OOP). They are web designers first, and programming in PHP is just a way to do things simple HTML can't do.

Neo is a graph-based database. While most databases present either a relational (SQL) or a hierarchical (XML) data model, with Neo you can think of your data as a network of entities. Each entity may be connected, that is: related to, other entities in the network in various forms. Neo provides the means for storing, updating and querying these networks.

Although test-driven development is now considered common sense in the OO world, it is very rare in database development. This session looks at the reasons behind that and presents solutions and best practices for test-driven database development.

Every once and a while I will need to need to store a hierarchical structure in a database table. Recently, I needed to do this for a Facebook.com application I am building. In this particular application, I needed to categorize pieces of content in a hierarchical form, which a users can access by drilling down one level at a time. This blog details the solution I implemented on how to store the data and access it. Aren’t there are other articles on this? Yes, but their approach is typically very trivial and has issues when building out the application.

In a recent blog post, Martin Fowler, a renown software thought leader, has predicted a global warming of the frozen database land. The world is stuck using RDBMS databases, and the time has come to evaluate the feasibility of using RISC RDBMS or document/XML databases.

A few years ago I heard programming language people talk about the "Nuclear Winter" in languages caused by Java. The feeling was that everyone had so converged on Java's computational model (C# at that point seen as little more than a rip-off) that creativity in programming languages had disappeared. That feeling is now abating, but perhaps a more important thaw that might be beginning - the longer and deeper freeze in thinking about databases.

Many people are confused about SQL Server’s precision and scale. This is unfortunate because choosing the correct values for precision and scale is critically important when you perform math operations using the decimal/numeric data type