[Oracle] Date 관련 쿼리

프로그래밍/Oracle

[Oracle] Date 관련 쿼리

도깨비방망이 2018. 4. 9. 13:06

[Oracle] Date 관련 쿼리

-- "First day of current month"
SELECT TRUNC (SYSDATE, 'MONTH') FROM DUAL;

-- "Last day of current month" 
SELECT TRUNC (LAST_DAY (SYSDATE)) FROM DUAL;

-- "Year First Day"
SELECT TRUNC (SYSDATE, 'YEAR')  FROM DUAL;

-- "Year Last Day"
SELECT ADD_MONTHS (TRUNC (SYSDATE, 'YEAR'), 12) - 1 FROM DUAL

-- Get number of days in current month
SELECT CAST (TO_CHAR (LAST_DAY (SYSDATE), 'dd') AS INT) FROM DUAL;

-- Get number of days left in current month
SELECT SYSDATE,
       LAST_DAY (SYSDATE) "Last",
       LAST_DAY (SYSDATE) - SYSDATE "Days left"
FROM DUAL;

-- Get number of days between two dates
SELECT ROUND ( (MONTHS_BETWEEN ('01-Feb-2014', '01-Mar-2012') * 30), 0)
FROM DUAL;
또는 
SELECT TRUNC(sysdate) - TRUNC(e.hire_date) FROM employees;

-- Display each months start and end date upto last month of the year
SELECT	ADD_MONTHS (TRUNC (SYSDATE, 'MONTH'), i) start_date,
		TRUNC (LAST_DAY (ADD_MONTHS (SYSDATE, i))) end_date
FROM	XMLTABLE (
          'for $i in 0 to xs:int(D) return $i'
          PASSING XMLELEMENT (
                     d,
                     FLOOR (
                        MONTHS_BETWEEN (
                           ADD_MONTHS (TRUNC (SYSDATE, 'YEAR') - 1, 12),
                           SYSDATE)))
          COLUMNS i INTEGER PATH '.');

-- Get number of seconds passed since today (since 00:00 hr)
SELECT (SYSDATE - TRUNC (SYSDATE)) * 24 * 60 * 60 FROM DUAL;

-- Get number of seconds left today (till 23:59:59 hr)
SELECT (TRUNC (SYSDATE+1) - SYSDATE) * 24 * 60 * 60 FROM DUAL;

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