Alice's Story

DBMS별 날짜 포멧
Oracle - MS SQL - DB2 UDB 의 서로 다른 날짜 형식을 맞추기위한 SQL문

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DBMS 별 시간, 날짜 조회 쿼리
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1. Oracle
- 날짜+시분초 까지 조회가능
select sysdate from dual;

- 날짜+밀리초+시간존 까지 조회
select current_timestamp from dual;

2. MS SQL
- 날짜 + 밀리초 단위까지 조회가능
select getdate();

3. DB2 UDB
- 날짜+밀리초까지 조회 가능
select current timestamp from sysibm.sysdummy1;
- 날짜만 조회
select current date from sysibm.sysdummy1;
- 밀리초 단위의 시간만 조회
select current time from sysibm.sysdummy1;

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DBMS 별 default date format
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1. Oracle
한글 : YYYY/MM/DD                       영어 : DD-MON-YYYY

2. MS SQL
한글 :  YYYY/MM/DD HH:MI:SS      영어 : MM-DD-YYYY HH:MI:SS

3. DB2 UDB
TIMESTAMP 타입 : YYYY-MM-DD-HH:MI:SS.MMMMMM
DATE 타입 : YYYY-MM-DD

TIME 타입 : HH:MI:SS.MMMMMM

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날짜 포맷 변환
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[ 형식 : 'YYYY.MM.DD' ]
1. Oracle : TO_CHAR(date_exp, 'YYYY.MM.DD')
2. MSSQL : CONVERT(VARCHAR, date_exp, 102)
3. DB2 : REPLACE(CHAR(DATE(date_exp),ISO), '-', '.')

[ 형식 : 'HH:MI:SS' ]
1. Oracle : TO_CHAR(date_exp, 'HH:MI:SS')
2. MSSQL : CONVERT(VARCHAR, date_exp, 108)
3. DB2 : CHAR(TIME(date_exp) , JIS )

[ 형식 : 'YYYY/MM/DD' ]
1. Oracle : TO_CHAR(date_exp, 'YYYY/MM/DD')
2. MSSQL : CONVERT(VARCHAR, date_exp, 111)
3. DB2 : REPLACE(CHAR(DATE(date_exp), ISO), '-', '/')

[ 형식 : 'YYYYMMDD' ]
1. Oracle : TO_CHAR(date_exp, 'YYYYMMDD')
2. MSSQL : CONVERT(VARCHAR, date_exp, 112)
3. DB2 : CHAR(DATE(date_exp))

[ 형식 : 'HH24:MI:SS' ]
1. Oracle : TO_CHAR(date_exp, 'HH24:MI:SS')
2. MSSQL : CONVERT(VARCHAR(8), date_exp, 114)
3. DB2 : CHAR(TIME(date_exp))

[ 형식 : 'YYYY.MM.DD HH24:MI' ]
1. Oracle : TO_CHAR(date_exp, 'YYYY.MM.DD HH24:MI')
2. MSSQL : CONVERT(VARCHAR, date_exp, 102) + ' ' + CONVERT(VARCHAR(5), date_exp, 114)
3. DB2 : REPLACE(CHAR(DATE(date_exp), ISO), '-', '.') || CAST( TIME(date_exp) AS CHAR(5))

[ 형식 : 'YYYY/MM/DD HH24:MI:SS' ]
1. Oracle : TO_CHAR(date_exp, 'YYYY/MM/DD HH24:MI:SS')
2. MSSQL : CONVERT(VARCHAR, date_exp, 111) + ' ' + CONVERT(VARCHAR(8), date_exp, 114)
3. DB2 : REPLACE(CHAR(DATE(date_exp), ISO), '-', '/') || CAST( TIME(date_exp))

- http://www.dbguide.net/ 발취