How can I use a SQL UPDATE statement to add 1 year to a DATETIME column?

Question

I want to add 1 year to a datetime-type column in every single row in a table. Adding using an UPDATE statement is easy for numeric types. ex:

UPDATE TABLE S         


        

Answer 1

UPDATE Procrastination SET DropDeadDueDate =
DATEADD(yy, 1, DropDeadDueDate)

ref: http://doc.ddart.net/mssql/sql70/da-db_5.htm