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Databases

Oskar Pihlak
Oskar Pihlak
2,094 Points
Posted by Oskar Pihlak
Oskar Pihlak
2,094 Points

LENGTH() operator

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 result returnud my the following : Your query didn't retireve the longest book title with it's length.

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

2 Answers

Marc Sanchez
Marc Sanchez
20,039 Points
Marc Sanchez
Marc Sanchez
20,039 Points

Since you're changing your title to 'longest_length' you'll need to ORDER BY longest_length.

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

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

:point_right: Try ordering by the length instead of the title.

Calculate the length in the ORDER BY clause the same way as you do for the SELECT clause. Then the first item returned will be the longest (instead of the last alphabetically).