将字符串从一个字符集转换为另外一个字符集
convert ( string1 , char_set_to , [char_set_from] )例如:
convert ('A B C D E ???? ?, 'US7ASCII', 'WE8ISO8859P1')
convert ( string1 , char_set_to , [char_set_from] )例如:
convert ('A B C D E ???? ?, 'US7ASCII', 'WE8ISO8859P1')
调试欢乐多
http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96540/functions22a.htm#SQLRF00620