1. SELECT: 평균 일일 대여 요금 구하기
oracle
SELECT ROUND(AVG(DAILY_FEE)) AS AVERAGE_FEE
FROM CAR_RENTAL_COMPANY_CAR
WHERE CAR_TYPE = 'SUV'
MS SQL Server
SELECT ROUND(AVG(DAILY_FEE)) AS AVERAGE_FEE
FROM CAR_RENTAL_COMPANY_CAR
WHERE CAR_TYPE = 'SUV'
- 둘 모두 반올림, 평균구하기에 있어서 동일한 함수명을 사용한다!