Only ever tested in MS SQLServer.

Remove Accents - SQL.sql

CREATE FUNCTION replaceAccentChar (@source as varchar(255))
RETURNS varchar(255) AS
BEGIN

declare @charList as varchar(20)
declare @temp as varchar(255)
declare @t asint

set @temp = @source
set @charList = 'aeioucn'

set @t = 0
while@t <= len(@charList)
begin
set @temp = replace(@temp, substring(@charList, @t, 1),
substring(@charList, @t, 1))
set @t = @t + 1
end
set @temp = Replace(@temp, 'œ', 'oe')
set @temp = Replace(@temp, '’', '''')

return@temp