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Language Help SQL
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<PLEASE USE THIS TEMPLATE TO HELP YOU CREATE A GREAT POST!>

<Below this line, add a link to the EXACT exercise that you are stuck at.>
https://www.codecademy.com/courses/sql-table-transformation/lessons/subqueries/exercises/correlated-i?action=lesson_resume

<Below this line, in what way does your code behave incorrectly? Include ALL error messages.>
What does this code mean? Especially the last line, I can’t comprehend.

<In this course, it often helps to include a screenshot of your whole web browser – that lets everyone see what you see. If you wish to include a screenshot, add it below this line.>

<If you wish to copy/paste in your code, you can use this next section. This will allow others to copy/paste your code for testing – something that they won’t be able to do with just a screenshot.>

``` SELECT id FROM flights AS f WHERE distance > ( SELECT AVG(distance) FROM flights WHERE carrier = f.carrier); ```
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