Chapter 13: Relationships
As you’ve worked through the construction of the Internet Joke Database website, you’ve had opportunities to explore most aspects of Structured Query Language (SQL). From the basic form of a
CREATE TABLE query to the two syntaxes of
INSERT queries, you probably know many of these commands by heart now.
In Chapter 5, I showed you how to perform basic
JOINs using SQL to fetch data from more than one table at a time. A lot of the time, you’ll come across situations where you want to do this—for example, finding information about an author as well as all the jokes they’ve posted, or finding a category and all the jokes that reside inside it.
JOIN is one of many solutions to this problem. Although there are performance ...