Most SQL developers hit a wall the first time they try to store a category tree or an organisational chart inside a relational database. Generally, flat tables handle rows well. But the moment you need to represent parent and childRead More
Trees in SQL – nested set modelAuthor: Joe Celko Rating: Visits: 61572 Discuss in NewsgroupsPage: The usual example of a tree structure in SQL books is called an adjacency list model and it looks like this:CREATE TABLE OrgChart(emp CHAR(10) NOT NULL PRIMARY KEY, boss CHAR(10)Read More
Welcome to our guide on XML in web development. Here at DevelopersDex, our developers work with XML regularly across client projects. We understand how it helps build websites that perform well and rank well. This guide breaks down XML syntaxRead More
Featured Guru March TOP 10 GurusNavin ShettyHELLO ALL I’m Navin Shetty, from a small town called Brahmavar, in Udupi dist in Karnataka state of INDIA. I’m a computer profession and working in Kingdom of Bahrain For European IT company Editec TechnologiesasRead More
Visual Basic was once the most popular programming language in the world, and today, most developers couldn’t tell you the last time they used it. Its rise and fall is one of the most interesting stories in software history. HereRead More
Modern web applications use SQL to store, retrieve, and manage data inside relational databases. In practice, web applications rely on SQL databases whenever users log in, place orders, or update profile information behind the scenes. These systems follow structured rulesRead More
Microsoft introduced C# in the early 2000s, and the language quickly became popular in professional web development. Today, developers use C# for web applications, web services, desktop software, and large business systems across many industries. The language also supports cross-platformRead More