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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.
Not kata-related.
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The data type of the characteristics column is Text.
column_name data_type
characteristics text
So when you try to select the distinct value of that column, the whole text is compared against the other rows.
id name characteristics
1 Cyril big, smelly
2 Tiny small, stinky, smelly
So give the above, it will check the "big, smelly" against "small, stinky, smelly" which are two different strings, even though the second one has a characteristic that the first one has.
@luthfirinda but functions are basic python
num_of_persons_that_didnt_got_the_joke += 1
def is just the keyword that starts the beginning of a function. When you write a function you write def and then the name of the function and then its parameters in parentheses followed by a colon.
No, they're different, you can read about postgresql here: https://www.postgresqltutorial.com/