oracle DB SQL 上的特殊字符

Question

Currently we are using this code to identify several rows which contain special characters. But it seems it's not capturing some events. Could you please share the optimized script to use for this scenario.

regexp_like(column_name, '^[^a-zA-Z]*$') then 'number'
regexp_like(column_name, '^[^g-zG-Z]*$') then 'hex'

Answer 1

If the string can have multiple characters, then you need to take this into account:

regexp_like(column_name, '^[0-9]+$') as is_integer
regexp_like(column_name, '^[0-9A-Fa-f]+$') as is_hex

Of course, both of these could be true.

Answer 2

I would suggest the shorter versions:

regexp_like(column_name, '^\d+$') as is_integer
regexp_like(column_name, '^[[:xdigit:]]+$') as is_hex