Loading collection data...
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.
why does it need to be converted to integer? Shouldn't count() automatically return only integers?
why does it need to be converted to integer? Shouldn't count() automatically return only integers?
This comment is hidden because it contains spoiler information about the solution
what is the benefit of using rank() vs row_num() ?