DAY
HOUR
MINUTE
시를 반환합니다.
HOUR(time)
아래 값을 입력하면 예제에 즉시 반영됩니다.
created_at
order_count
orders
-- 시간대별 주문량 SELECT HOUR(created_at) AS hour, COUNT(*) AS order_count FROM orders GROUP BY hour ORDER BY hour;