15. Solutions: Aliases for Multiple Window Functions
Aliases for Multiple Window Functions
SELECT id,
account_id,
DATE_TRUNC('year',occurred_at) AS year,
DENSE_RANK() OVER account_year_window AS dense_rank,
total_amt_usd,
SUM(total_amt_usd) OVER account_year_window AS sum_total_amt_usd,
COUNT(total_amt_usd) OVER account_year_window AS count_total_amt_usd,
AVG(total_amt_usd) OVER account_year_window AS avg_total_amt_usd,
MIN(total_amt_usd) OVER account_year_window AS min_total_amt_usd,
MAX(total_amt_usd) OVER account_year_window AS max_total_amt_usd
FROM orders
WINDOW account_year_window AS (PARTITION BY account_id ORDER BY DATE_TRUNC('year',occurred_at))
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