¿¹»³¤Ç¤¹¡£

SOUMA Yutaka wrote:
>> MySQL ¤Ë 4¥Ð¥¤¥Èʸ»ú¤ò´Þ¤à UTF8 ʸ»úÎó¤ò INSERT/UPDATE ¤·¤è¤¦¤È¤¹¤ë¤È¡¢
>> Îã¤Ë¤è¤Ã¤Æ¤½¤Îʸ»ú°Ê¹ß¤¬¤¹¤Ù¤Æ¾Ã¤¨¤Æ¤·¤Þ¤¤¤Þ¤¹¡£
> 
>    4ʸ»ú¤ò3+3ʸ»ú¤ËÊÑ´¹¤È¤«¤­¤«¤Ê¤¤¤â¤Î¤Ç¤·¤ç¤¦¤«?

UTF-8 (RFC 3629) ¤Ç¤Ï¡¢¤½¤Î¤è¤¦¤ÊÉä¹æ²½¤Ï¡¢¶Ø»ß¤µ¤ì¤Æ¤¤¤Þ¤»¤ó¤Ç¤·¤¿¤Ã¤±?
http://www.rfc-editor.org/rfc/rfc3629.txt
http://www.akanko.net/marimo/data/rfc/rfc3629-jp.txt

UTF-16 ¤Î¥µ¥í¥²¡¼¥È¥Ú¥¢¤Îʸ»ú¤ò 3¥Ð¥¤¥È+3¥Ð¥¤¥È¤Çɽ¸½¤¹¤ëÉä¹æ²½Êý¼°¤Ï¡¢
CESU-8 ¤È¤¤¤¦Ì¾Á°¤¬ÉÕ¤±¤é¤ì¤Æ¤¤¤ë¤è¤¦¤Ç¤¹¡£
http://unicode.org/reports/tr26/

UTF8 ¤È¤¤¤¦Ì¾Á°¤Ç¤Ï¡¢Àµ¤·¤¯ RFC 3629 Ä̤ê¤Î¼ÂÁõ¤ò¤·¤Æ¡¢¸½¹Ô¤Î 3 ¥Ð¥¤¥È¤Þ
¤Ç¤·¤«¥µ¥Ý¡¼¥È¤µ¤ì¤Æ¤¤¤Ê¤¤ UTF8 ¤Ï¡¢CESU8 ¤È²þ̾¤·¤¿Êý¤¬¹¥¤Þ¤·¤¤¤Î¤Ç¤Ï¤Ê
¤¤¤«¤È»×¤Ã¤Æ¤¤¤Þ¤¹¡£

¤¿¤À¡¢UTF8 ¤È¤¤¤¦Ì¾Á°¤Ç CESU-8 ¤ò´üÂÔ¤¹¤ë¥¢¥×¥ê¥±¡¼¥·¥ç¥ó¥½¥Õ¥È¤¬´û¤Ë¿
¤¯³«È¯¤µ¤ì¤Æ¤·¤Þ¤Ã¤Æ¤¤¤ë¤È¡¢Èó¸ß´¹¤ÎÌäÂê¤òÀ¸¤¸¤ë¤Î¤Ç¤·¤ç¤¦¤Í¡£Çº¤Þ¤·¤¤Ìä
Âê¤Ç¤¹¡£