Returns an integer that represents the year of the specified date.
For an overview of all Transact-SQL date and time data types and functions, see Date and Time Data Types and Functions (Transact-SQL). For information and examples that are common to date and time data types and functions, see Using Date and Time Data.
YEAR (date )
Is an expression that can be resolved to a time, date, smalldatetime, datetime, datetime2, or datetimeoffset value. The date argument can be an expression, column expression, user-defined variable or string literal.
YEAR returns the same value as DATEPART (year, date).
If date only contains a time part, the return value is 1900, the base year.
The following statement returns 2007. This is the number of the year.
The following statement returns 1900, 1, 1. The argument for date is the number 0. SQL Server interprets 0 as January 1, 1900.
SELECT YEAR(0), MONTH(0), DAY(0);