Finding and removing non ascii characters from an Oracle Varchar2

Question

We are currently migrating one of our oracle databases to UTF8 and we have found a few records that are near the 4000 byte varchar limit. When we try and migrate these reco

Answer 1

Try the following:

-- To detect
select 1 from dual
where regexp_like(trim('xx test text æ¸¬è© ¦ “xmx” number²'),'['||chr(128)||'-'||chr(255)||']','in')

-- To strip out
select regexp_replace(trim('xx test text æ¸¬è© ¦ “xmxmx” number²'),'['||chr(128)||'-'||chr(255)||']','',1,0,'in')
from dual