We learned a little bit about representing data in an XML file, but now we need to address its limitations.
What happens when you have multiple items that have connections between them? That's when you need a "relational database".
One of the most popular formats for a relational database is called SQL. SQL is table based, and it lets you integrate large quantities of data into your web page creations using intermediate languages like PHP.
Let's take a look at my site, Thinkersmith, to see how databases can be used fo' reals.
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