Find an example of a webpage that displays data retrieved from a database. Which elements of the page are retrieved from the database and which are hard-coded into the page? What advantage is gained by using a database in this case? What do you think the SQL query used to retrieve the page data might look like?

What are the differences among a markup language like HTML, a procedural language like Visual Basic, and a non-procedural query language like SQL? What is the role of each language in programming a web application? Why is it important for a web developer to know all these languages?