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Databases

Fabio Campanini
PLUS
Fabio Campanini
Courses Plus Student 1,544 Points

Can anyone help me with the "Finding the Length of Text" exercise?

The text of the exercise is: "In the library database there's a books table with the columns id, title, author, genre and first_published. Find the book with the longest title. Show the title and then the length. Alias the result of the length calculation to be longest_length. Only retrieve the longest book."

The code I wrote is: select title, length(title) as longest_length from books order by title desc limit 1;

The system tells me that it is wrong, but I am not able to find the mistake; can anyone help me, please?

Nick Wilson
Nick Wilson
5,060 Points

You'll need to order by the longest_length because you aliased the title during the query.

SELECT title, LENGTH(title) AS longest_length FROM books ORDER BY longest_length DESC LIMIT 1;