The DAYOFMONTH function returns an integer between 1 and 31 that represents the day of the month.
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.
SELECT DAYOFMONTH(PRENDATE) INTO :END_DAY FROM PROJECT WHERE PROJNAME = 'WELD LINE PLANNING'Results in END_DAY being set to 15.
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