There are a number of special characters that needs to be escaped (protected), if you want to include them in a character string. Here are some basic character escaping rules:
► The escape character () needs to be escaped as (\).
► The single quote (') needs to be escaped as (') or ('') in single-quote quoted strings.
► The double quote (") needs to be escaped as (") or ("") in double-quote quoted strings.
► The wild card character for a single character (_) needs to be escaped as (_).
► The wild card character for multiple characters (%) needs to be escaped as (%).
► The tab character needs to be escaped as (t).
► The new line character needs to be escaped as (n).
► The carriage return character needs to be escaped as (r).
Here are some examples of how to include special characters:
SELECT 'It''s Sunday!' FROM DUAL;
It's Sunday!
SELECT 'Allo, C'est moi.' FROM DUAL; Allo, C'est moi.
SELECT 'MontTuetWedtThutFri' FROM DUAL;
Mon Tue Wed Thu Fri