check if “it's a number” function in Oracle

Question

I\'m trying to check if a value from a column in an oracle (10g) query is a number in order to compare it. Something like:

select case when ( is_number(myTab         


        

Answer 1

You can use this example

SELECT NVL((SELECT 1 FROM  DUAL WHERE   REGEXP_LIKE (:VALOR,'^[[:digit:]]+$')),0) FROM DUAL;