<PLEASE USE THIS TEMPLATE TO HELP YOU CREATE A GREAT POST!>So this code passes correctly, I was just curious for what does the final statement mean. What is the significance of having carrier = f.carrier? Thanks!
<Below this line, in what way does your code behave incorrectly? Include ALL error messages.>
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<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.>```
FROM flights AS f
WHERE distance < (
WHERE carrier = f.carrier);
<do not remove the three backticks above>