A subquery is select statement contained within an outer select statement. Two types of subqueries are available in SQL: the simple subquery and the correlated subquery. In this topic you will learn how to write each type of subquery.

I ran into this problem while writing our Creating, Styling, and Validating Web Forms course. I was showing how browsers make an automatic request for “/favicon.ico” when first visiting a new site. However, once they’ve received the icon or determined it doesn’t exist, they don’t request it again on subsequent visits. That created a headache […]

A derived Java class does not inherit a constructor from its base class. If a base class has a default constructor, i.e., a constructor with no arguments, then that constructor is automatically called when a derived class is instantiated if the derived class has its own default constructor. A default constructor is automatically provided by […]

With the box-shadow property, we can attach a drop shadow to an element. In this brief article, we show how.

Node.js is required for using many JavaScript tools and for creating server-side JavaScript applications. Here is how you install Node.js on Windows.

Learn how to download files.

Learn how to unzip files.

In 2016, we launched a new website, and I wrote a Python script that checked our old sitemap to make sure that we had all our 301 redirects properly in place. Five years later, we are again launching a new site, so I revisited that script.

16th Inaugural Address used for Webucator’s Python Project. Source: senate.gov website.

29th Inaugural Address used for Webucator’s Python Project. Source: senate.gov website.