Let's say we have a new table called books. There are various columns in books like name, price, publishedIn, etc.
There is also a column called courseId, which is a reference to the id in existing courses table. What it means is, each book belongs to a course that exists in courses table, referenced by the courseId.
Write a query to display the name and price of books which belong to a course (have a not-null courseId), along with the name of the course they belong to.
The headers for the name of books, price of books, and name of course should be bookName, price and courseName respectively.