adding days to date in sql server code example

Example 1: sql add days to date

//Returns Date time
//Takes where to add (as in year, month, day, etc) to
//Takes how much to add
//Takes a datetime in some different formats
DATEADD(day, 1, '2017/08/25')

Example 2: sql server current date minus 5 years

SELECT GETDATE() 'Today', 
           DATEADD(day,-2,GETDATE()) 'Today - 2 Days'
SELECT GETDATE() 'Today', 
           DATEADD(dd,-2,GETDATE()) 'Today - 2 Days'
SELECT GETDATE() 'Today', 
           DATEADD(d,-2,GETDATE()) 'Today - 2 Days'

Example 3: sql server today minus n

SELECT GETDATE() - 1