You can use CONVERT(
function to change that into date. For example
SELECT CONVERT(DATE,'20140210',112)
After you change it into date you can output it into any format that you want.
Read http://msdn.microsoft.com/en-us/library/ms187928.aspx for list of all styles that you can use for DATE
when converting it. 112
stands for yyyymmdd
format.
if date is stored as Numeric field you will need to convert it to VARCHAR before converting it to DATE,
SELECT CONVERT(DATE,CONVERT(VARCHAR(10),20140204),112)