Searching ASCII ranges in a string.

Question

I was wanting to know if it was possible to find all ASCII values higher than 127 DECmal within a string of characters.
example table
table a
cust_id Example String
111111 My name is Bob and I have 100 pounds <-- nothing above 127 DEC
111112 My name is Carol and I have 200 pounds <-- nothing above 127 DEC
111113 My name is James and I have £1 <-- the pound sign is ascii 157 DEC
my ideal output would be, simply to return the cust_id i.e. 111113
Is this possible?

Answer 1

What database version? You have more/easier options in 10g and above than in earlier releases:
select dump('abcZ') from dual;
select cust_id
     , example
     , regexp_instr(example, '[^'||  --Match any charater not in the following range
                             chr(1)||--First Character in range
                             '-'||  
                             chr(127)||--Last character in range
                             ']') location
  from A
where regexp_like(example, '[^'||  --Match any charater not in the following range
                             chr(1)||--First Character in range
                             '-'||  
                             chr(127)||--Last character in range
                             ']');