The DAYOFYEAR function returns an integer between 1 and 366 that represents the day of the year where 1 is January 1.
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 AVG(DAYOFYEAR(HIREDATE)) INTO :AVG_DAY_OF_YEAR FROM EMPLOYEEResults in AVG_DAY_OF_YEAR being set to 197.
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