꿈라CBTSQL 윈도우 함수에서 ORDER BY 절만 사용했을 때 적용되는 기본 프레임 설정으로 올바른 것은?
- 1ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING
- 2RANGE BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
- 3RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW
- 4ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING