CamelCase in SQL

Example for versions Oracle 10g SQL, Oracle 11g SQL

This example uses Oracle SQL regular expressions. First use of regexp_replace replaces all digits with spaces — this is necessary for further initcap usage (this function treats digits as parts of the words and doesn’t capitalize following letters). Next, initcap converts all words to lowercase with first letter capitalized. Finally, second use of regexp_replace removes all punctuation and spaces from the string.

&TEXT is substitution variable, which allows to input different strings without rewriting the select statement. 

select regexp_replace(initcap(regexp_replace('&TEXT', '[[:digit:]]', ' ')), '([[:punct:] | [:blank:]])', '')
  from dual