This function translates a string from a given source charset to a destination charset.  It provides a generic way of recoding string entities.The src_charset may be a narrow or a wide string. If it@s a narrow string (VARCHAR) then the src_charset is taken into account and defines the current encoding of the src_string.  In any other case src_charset is ignored.src_charset and dst_charset are names of system-defined 8 bit charset tables. Use charsets_list to obtain a list of currently defined character sets and aliases. If either of these is null, then the charset in effect is used. There are two special character set names - "UTF-8" and "_WIDE_" - that are recognized by this function. These represent UTF-8 encoding of characters and wide string (NVARCHAR).