adding date in sql 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: insert date sql

INSERT INTO FOO (xpto) VALUES(TO_DATE('17/12/2015', 'DD/MM/YYYY'));

Example 3: 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'