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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.
postgresql is so weird that you have to explicitly cast a float/float operation to a numeric even though we are only dealing with numbers here!
You should be able to just use a ROUND(x, 2)...
It teaches that you should try to understand the problem before rushing in and writing code
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