Returns the number of days from the beginning of the year to the specified date.
A calendar name. The possible values are Teradata, ISO, and COMPATIBLE.
This argument must be a character literal and cannot be a table column or expression. If you do not name a calendar, Teradata uses the calendar for the session.
An expression that results in a DATE, TIMESTAMP, or TIMESTAMP WITH TIME ZONE value.
The business calendar for the session.
Name of the database where the function is located.
This is a Teradata extension to the ANSI SQL:2011 standard.
The first argument, expression, is defined with the following data types:
The second argument, calendar_name, is optional and is defined with the following argument data types:
If the argument passed to the function does not match one of these declared data types, an error is returned indicating that the function does not exist.
The result is an INTEGER value from 1 through 366.
The DayNumber_Of_Year function provides improved performance compared to using the Sys_Calendar.Calendar system view to obtain similar results.
For more information about the CALENDAR system view, see Data Dictionary.
If the current date is February 10, 2010, the following queries return
41 because February 10, 2010, is the 41st day since the beginning of the Teradata calendar
SELECT TD_SYSFNLIB.DAYNUMBER_OF_YEAR(DATE '2010-02-10');