mysql -h10.10.10.10 -uroot -p123456 -P3306 -Ne "select * from table_name into outfile '/tmp/table_name_result.txt' "
mysql -h10.10.10.10 -uroot -p123456 -P3306 -N < run.sql > /tmp/table_name_result.txt
insert into class_refund_order_detail (refundds,classid) VALUES (%s,%s) on duplicate key update refundds=values(refundds),classid=values(classid)
show variables like 'character_%';
show variables like 'collation_%';
/usr/bin/mysqldump --single-transaction --quick --lock-tables=true --all-databases | gzip -c > /backup/mysql-$(date +\%F).sql.gz