[DATABASE/POSTGRESQL] GENERATE_SERIES 함수 : 1개월치 날짜 구하기

■ GENERATE_SERIES 함수를 사용해 1개월치 날짜를 구하는 방법을 보여준다.

 

▶ 예제 코드 (SQL)

SELECT DATE_TRUNC('MONTH', CURRENT_DATE)::DATE + (I - 1)
FROM   GENERATE_SERIES
(
    1
   ,EXTRACT(DAY FROM DATE_TRUNC('MONTH', CURRENT_DATE + INTERVAL '1 MONTHS')::DATE - 1)::INTEGER
) AS T(I);


SELECT DATE_TRUNC('MONTH', CURRENT_DATE)::DATE + (I - 1)
FROM   GENERATE_SERIES
(
    1
   ,EXTRACT(DAY FROM DATE_TRUNC('MONTH', CURRENT_DATE) + INTERVAL '1 MONTHS' - INTERVAL '1 DAYS')::INTEGER
) AS T(I);