Graph SQL Server Data Daily Values

I am capturing database size information once a day and storingit in a SQL Server database table. I would like to graph the data with daily values on the x axis (no time). Below is the query that I am using.

 SELECT date_time_et AS time,
                size_bytes/1024 AS size_mb
     FROM database_size

Can you please let me know how I can achieve this behavior in Grafana v6.0.0?