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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.
This comment is hidden because it contains spoiler information about the solution
This comment is hidden because it contains spoiler information about the solution
I wrote 1st solution in PostgreSQL, but I didn't pass last test. Then, I select rows in original order and I pass it. I thought line order doesn't matter in SQL. It's most common behavior.