문자 바꿈

http://database.sarang.net/?inc=read&aid=2671&criteria=pgsql&subcrit=&id=&limit=20&keyword=%B9%AE%C0%DA%BF%AD+%C7%D4%BC%F6&page=4

translate() 함수로 해결을 할 수 있을 듯싶습니다.

함수: translate(string text, from text, to text):

설명: text Any character in string that matches a character in the from set is replaced by the corresponding character in the to set.

예: translate('12345', '14', 'ax')

결과: a23x5