mysql group by 옵션

vi /etc/my.cnf

...
#socket=/var/lib/mysql/mysql.sock

port=13306
datadir=/data/mysql
socket=/data/mysql/mysql.sock

sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
...

sql mode 추가