If the date 12/3/2012 is in a field called DateField, then you would have the following in your query:
- Year(DateField) AS YearField
You can do the same thing with Month() and Day().
Note: Don't name a field Year, Month, or Day, or Date even as an alias (the part after the AS) as these are reserved names and can cause problems when trying to reference them. Hence, my naming it DateField and YearField. You can can change the alias to be more descriptive for its use.