1、修改编码：http://blog.sina.com.cn/s/blog_7122661501018v70.html
设置默认编码show variables like 'character_set_%';
set character_set_client = utf8;
set character_set_server = utf8;
set character_set_connection = utf8;
set character_set_database = utf8;
set character_set_results = utf8;
set collation_connection = utf8_general_ci;
set collation_database = utf8_general_ci;
set collation_server = utf8_general_ci;
2、service mysql stop/restart/start
service mysqld stop/restart/start
repair table `app`.`performance_assessment_point`;
repair table `app`.`performance_assessment_point`;