InfluxDB's fill() function can be used to eliminate blank field values in query results, with options including replacing values with the numerical value of choice, linear interpolation, or previous interval values. InfluxQL also supports subqueries, allowing users to calculate the sum of differences between min and max values in a field by wrapping the calculation in parentheses. Additionally, InfluxDB now offers free downloads for the TICK-stack, cloud deployments, server deployments with a 14-day trial, and a storytelling initiative featuring over 300 companies that have benefited from using InfluxDB.