一.安装mysql，可能遇到如下异常
①ERROR 1045 (28000): Access denied for user 'ODBC'@'localhost' (using password)
http://jingyan.baidu.com/article/3ea51489e6cfbe52e61bba25.html
②FUNCTION mysql.passowrd does not exist
说明：password要使用大写，如下：
update user set password=PASSWORD("123456") where user="root"
