Version: * Grafana v8.3.4 (a551d74b1)
Data source: MySQL
select date as time, site_scan as metric from r7_metrics_rollup;
2022-01-30 00:00:00 100
2022-01-31 00:00:00 100
2022-02-01 00:00:00 100
For the first 2 days after installing Grafana, the spark line worked. After day 3, it stopped and none of my panel’s spark lines work any more. This is true for Stat, Single Stat, Blend Stat panels.
Picture shows example panel config options.
I tried this out with your sample data in CSV format and got it working in stat with Graph mode set to Area
I couldn’t get it working with blendstat either, though it did work with prometheus data. It could be worth opening an issue with the developer in their github repository (https://github.com/farski/blendstat-grafana). I don’t see a lot of activity there, so I’m not sure how active they are.
There are a lot of examples of sparklines with the stat panel on play.grafana.org. It could be helpful to share the stat panel configuration here too if you’re still not seeing the sparklines there.
Stats dashboard examples