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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.
some points:
partition by name is unnecessary because there is only one name of customer_id = 1
dense_rank is unnecesary because all dates will be distinct, you can use row_number function
many from tables, making it unreadable
Cheers
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spetacular solution in calc increasing fifty!
fantastic!