DBMS별 날짜 포맷변환

DBMS 별 시간, 날짜 조회 쿼리

 

Oracle	select sysdate from dual; 날짜+시분초 까지 조회가능                                 select current_timestamp from dual;  날짜+밀리초+시간존 까지 조회
MS SQL	select getdate()    날짜 + 밀리초 단위까지 조회가능
DB2 UDB	select current timestamp from sysibm.sysdummy1  날짜+밀리초까지 조회 select current date from sysibm.sysdummy1          날짜만 조회               select current time from sysibm.sysdummy1            밀리초 단위시간조회

 

DBMS 별 default date format

Oracle	YY/MM/DD  (한글)                                                                                       DD-MON-YYYY  (영어)
MS SQL	YYY/MM/DD HH:MI:SS   (한글)                                                                      MM-DD-YYYY HH:MI:SS   (영어)
DB2 UDB	YYYY-MM-DD-HH:MI:SS.MMMMMM (TIMESTAMP 타입)                                 YYYY-MM-DD (DATE 타입)                                                                           HH:MI:SS.MMMMMM (TIME 타입)

 

날짜 포맷 변환표

형식	RDBMS	변환 문법
'YYYY.MM.DD'	Oracle	TO_CHAR(date_exp, 'YYYY.MM.DD')
	MSSQL	CONVERT(VARCHAR, date_exp, 102)
	DB2	REPLACE(CHAR(DATE(date_exp),ISO), '-', '.')
'HH:MI:SS'	Oracle	TO_CHAR(date_exp, 'HH:MI:SS')
	MSSQL	CONVERT(VARCHAR, date_exp, 108)
	DB2	CHAR(TIME(date_exp) , JIS )
'YYYY/MM/DD'	Oracle	TO_CHAR(date_exp, 'YYYY/MM/DD')
	MSSQL	CONVERT(VARCHAR, date_exp, 111)
	DB2	REPLACE(CHAR(DATE(date_exp), ISO), '-', '/')
'YYYYMMDD'	Oracle	TO_CHAR(date_exp, 'YYYYMMDD')
	MSSQL	CONVERT(VARCHAR, date_exp, 112)
	DB2	CHAR(DATE(date_exp))
'HH24:MI:SS'	Oracle	TO_CHAR(date_exp, 'HH24:MI:SS')
	MSSQL	CONVERT(VARCHAR(8), date_exp, 114)
	DB2	CHAR(TIME(date_exp) )
'YYYY.MM.DD HH24:MI'	Oracle	TO_CHAR(date_exp, 'YYYY.MM.DD HH24:MI')
	MSSQL	CONVERT(VARCHAR, date_exp, 102) + ' ' + CONVERT(VARCHAR(5), date_exp, 114)
	DB2	REPLACE(CHAR(DATE(date_exp), ISO), '-', '.') || CAST( TIME(date_exp) AS CHAR(5))
'YYYY/MM/DD HH24:MI:SS'	Oracle	TO_CHAR(date_exp, 'YYYY/MM/DD HH24:MI:SS')
	MSSQL	CONVERT(VARCHAR, date_exp, 111) + ' ' + CONVERT(VARCHAR(8), date_exp, 114)
	DB2	REPLACE(CHAR(DATE(date_exp), ISO), '-', '/') || CAST( TIME(date_exp))