Is_Number Function

One of the functions that came in handy for me the Is_number function. This function would consume a string and figure out if its a number or not. If the string is a number, the return value is '1'
if not it will return '0'

 FUNCTION is_number (p_string IN VARCHAR2)
      RETURN INT
   IS
      v_new_num   NUMBER;
   BEGIN
      v_new_num := TO_NUMBER (p_string);
      RETURN 1;
   EXCEPTION
      WHEN VALUE_ERROR
      THEN
         RETURN 0;
   END is_number;

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