Example: Querying Number of Months from the Beginning of the Calendar - Teradata Vantage

If the current date is May 5, 1901, the following query returns 17 because May 5, 1901, is in the 17th month since the start of the Teradata calendar on 1900-01-01:

SELECT TD_SYSFNLIB.MONTHNUMBER_OF_CALENDAR(CURRENT_DATE);

The following query returns 17 because May 5, 1901, is in the 17th month since the start of the COMPATIBLE calendar on 1900-01-01:

SELECT TD_SYSFNLIB.MONTHNUMBER_OF_CALENDAR(DATE '1901-05-05','COMPATIBLE');