Get extension of a file using SQL? [duplicate]

Answer 1

try this:

declare @str varchar(20)='MyDoc.doc';
select reverse(left(reverse(@str),charindex('.',reverse(@str))-1))

SQL fiddle demo

Answer 2

With string functions:

SELECT Extension =
   Right([Name],
        CHARINDEX('.',
                  REVERSE([Name]))-1)
FROM dbo.Files

SQL fiddle demo

Answer 3

  SELECT RIGHT('myFile.txt', 
               CHARINDEX('.', REVERSE('myFile.txt'))-1) AS 'File Extension'

Documentation: SUBSTRING, RIGHT, CHARINDEX, REVERSE

Answer 4

declare @str varchar(20)='MyDoc.doc'
select reverse(left(reverse(@str),CHARINDEX('.',reverse(@str))-1))

FIDDLE DEMO

Answer 5

Try this :

select parsename(filename,1) from yourTable

sqlfiddle demo