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Databases Reporting with SQL Working with Text Getting the Length of a String

Hello! I can't get through Challenge task "Getting the Length of a String"

My answer is: SELECT title, LENGTH(title) AS length FROM books AS longest_length ORDER BY length DESC LIMIT 1; I checked this answer in a database, it's correct.

3 Answers

Steven Parker
Steven Parker
217,577 Points

This statement has no syntax errors, but it does something different from what the challenge asked for. This kind of "false positive" is a common problem when testing challenge code outside of the challenge.

The challenge asked that the column that shows the calculation result to be aliased as "longest_length" but this code names that column "length" instead.

This code also creates an alias for the table, but that isn't needed for this challenge.

Thuy Van Ngo
Thuy Van Ngo
2,525 Points

It didn't work that way either. I've tried your suggestion. It still shows as a wrong solution.

Thuy Van Ngo
Thuy Van Ngo
2,525 Points

SELECT title, LENGTH(title) AS length FROM books ORDER BY length DESC LIMIT 1; still wrong...

Steven Parker
Steven Parker
217,577 Points

The instructions say to "Alias the result of the length calculation to be longest_length." But this code is using just "length" as the alias instead.

Next time start a new question instead of asking one in an answer. It will be seen by more students that way, and give you a better chance for a rapid reply.

Thuy Van Ngo
Thuy Van Ngo
2,525 Points

Thanks for your tip :)