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Databases

qianyi wang
qianyi wang
601 Points
Posted by qianyi wang
qianyi wang
601 Points

I do not know the correct answer

select title , length(title) as longest_length from books order by longest_length limit 1;

why this answer is not correct , can anyone give me the correct answer?

1 Answer

jcorum
jcorum
71,830 Points
jcorum
jcorum
71,830 Points

You didn't give a link to the challenge, and you didn't say what the challenge wants, so I'm guessing. But try this:

SELECT title , length(title) as longest_length FROM books ORDER BY length(title) DESC limit 1;

Some DBMSs won't let you use an alias in ORDER BY. You need the DESC to put the longest title first, so that when you limit the query to one row you do get the longest.