The DAYS function returns an integer representation of a date.
If expression is a character or graphic string, it must not be a CLOB or DBCLOB and its value must be a valid string representation of a date or timestamp. For the valid formats of string representations of dates and timestamps, see String representations of datetime values.
The result of the function is a large integer. If the argument can be null, the result can be null; if the argument is null, the result is the null value.
The result is 1 more than the number of days from January 1, 0001 to D, where D is the date that would occur if the DATE function were applied to the argument.
SELECT DAYS(PRENDATE) - DAYS(PRSTDATE) INTO :EDUCATION_DAYS FROM PROJECT WHERE PROJNO = 'IF2000'Results in EDUCATION_DAYS being set to 396.
SELECT SUM(DAYS(PRENDATE) - DAYS(PRSTDATE)) INTO :TOTAL_DAYS FROM PROJECT WHERE DEPTNO = 'E21'Results in TOTAL_DAYS being set to 1584.
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