Need reg_exp for checking the string contains only alphanumeric or not

Question

Dear All,
I need to check the given string in if condtion contains only the alphanumeric or not pls help me..
like
if reg_exp then
end if;
thanks,
Oracle

Answer 1

Hi,
REGEXP_LIKE ( str
            , '[^[:alnum:]]'
            )returns TRUE if the string str contains any character other than an alphanumeric.
You can use this wherever conditions are allowed, such as a WHERE clause or a CASE expression. For example:
SELECT     str
.     CASE
         WHEN  REGEXP_LIKE ( str
                     , '[^[:alnum:]]'
         THEN  'Contains speace, punctuation or special symbol'
         ELSE  'Okay'
     END               AS is_alnum
FROM     table_x
I hope this answers your question.
If not, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only), and the results you want from that data.
Explain, using specific examples, how you get those results from that data.
Always say what version of Oracle you're using.
Edited by: Frank Kulash on Dec 30, 2011 4:37 AM