Transaction SQL

gistfile1.txt

SELECT 
  transaction_date, 
  AVG(transaction_amount) AS rolling_avg
FROM (
  SELECT 
    DATE_TRUNC('day', transaction_time) AS transaction_date, 
    SUM(transaction_amount) AS transaction_amount
  FROM 
    transactions
  WHERE 
    DATE_TRUNC('day', transaction_time) BETWEEN '2021-01-29' AND '2021-01-31'
  GROUP BY 
    DATE_TRUNC('day', transaction_time)
) AS daily_totals
GROUP BY 
  transaction_date
ORDER BY 
  transaction_date;