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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.
👏🏼 but
el = 'U' is unnecessary
It might be my limited Postgres knowledge, but shouldn't we have to join all these tables before we output the required result set?
The description says that Jon and Mike work at different companies. They don't. Threw me off for a bit trying to figure out the trick...
Wouldn't this work without chaining the second Substring method?