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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.
It uses join, and also a bad one
Specifying multiple tables in
FROM
clause is the same as making aCROSS JOIN
.Of all the solutions about yours, yours is the first one that doesn't use a join. I didn't use a join either as it was not necessary.