Top 3 Users
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Let’s say you work at a file-hosting website. You have information on user’s daily downloads in the download_facts table
Use the window function RANK to display the top three users by downloads each day. Order your data by date, and then by daily_rank
Example:
Input:
download_facts table
| Column | Type |
|---|---|
user_id |
INTEGER |
date |
DATE |
downloads |
INTEGER |
Output:
| Column | Type |
|---|---|
daily_rank |
INTEGER |
user_id |
INTEGER |
date |
DATE |
downloads |
INTEGER |
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