Using substr / instr to parse a filepath help

Question

I'm having trouble parsing a string per say using sql. I have a column full of file paths. The file paths are similar to:
C:\Users\Guest\Pictures\example.jp
I want to be ablt to grab just the file name of the image. I've been working on several variations of a query using the substr function and the instr function. I've come up with the query below. FILEPATH is the name of the column. So far it gives me the file name, but has the '\' in front of it. Can anyone help me get rid of this. Thanks in advance.
Select substr(FILEPATH, (instr(FILEPATH,'\',-1,1)))
from Table_Name
where ID = '101'

Answer 1

Hi,
Here's one way:
SELECT  SUBSTR ( filepath
               , INSTR ( filepath
                       , -1
                       , 1
                       ) + 1    -- Note   + 1   at end
                ) AS file_name_only
FROM    Table_Name 
WHERE   id = '101'
SUBSTR (str, p)        returns the last part of string str, starting at position p.  You were passing the position of the last '\' as p; that's why the '\' was included.  If you add 1 to p, like this:
SUBSTR (str, p+1)      then you'll be passing the position of the 1st character after the last '\'.