Rolling Bank Transactions
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We’re given a table of bank transactions with three columns, user_id, a deposit or withdrawal value (determined if the value is positive or negative), and created_at time for each transaction.
Write a query to get the total three-day rolling average for deposits by day.
Note: Please use the format '%Y-%m-%d' for the date in the outout
Example:
Input:
bank_transactions table
| Column | Type |
|---|---|
user_id |
INTEGER |
created_at |
DATETIME |
transaction_value |
FLOAT |
Output:
| Column | Type |
|---|---|
dt |
VARCHAR |
rolling_three_day |
FLOAT |
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