Adding mysql querry on Grafana 7

I tried to monitor mysql database using influxdb and telegraf
but it keeps displaying error
i already posted it in an issue but i got no response
so i’am trying to do it with the old way (adding panels manually)
i’am newby on Mysql
could someone help me to generate my querry
i’am using Mysql Datasource now and i’am trying to display many things like Bytes_received/sent number of connections on databases
image
i tried this querry : SELECT
UNIX_TIMESTAMP(VARIABLE_VALUE) as time_sec,
VARIABLE_VALUE as value
FROM status_by_user
where VARIABLE_NAME = 'Bytes_received
i show no error but it keeps displaying ''NO DATA""