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I just followed the guideline to finish the coding, but do not understand how it works. Could you please help explain? Thanks!
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why is the user_id repeated so many times after self join? There are, in fact, no so many items in table “gameplay”. Then what does the repeating user_id indicate?
<If you wish to copy/paste in your code, you can use this next section. This will allow others to copy/paste your code for testing – something that they won’t be able to do with just a screenshot.>```
date(g1.created_at) as dt, g1.user_id
from gameplays as g1
join gameplays as g2 on
g1.user_id = g2.user_id
order by 1
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