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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Okay, so, you know CW has an entry test for a reason, right? That's the low bound of which an
8kyu
kata can be in difficulty, since otherwise you can't even register for the site in the first place.And this kata is even simpler than the entry test, which means it's not really suitable as a kata.
Presence of extraneous columns in the result isn't checked.
Using
SELECT
is a part of (almost) every SQL kata. Creating a separate task just for this is worthless.Duplicate of this kata.
Sample tests are wrong.
Sample tests are wrong.
Sample tests are wrong.