The following time series databases are popular right now:
* ClickHouse (this is a general-purpose OLAP database, but it is easy to adapt it to time series workloads)
* InfluxDB
* TimescaleDB
* M3DB
* Cortex
* VictoriaMetrics
The last three of these TSDBs support PromQL query language - the most practical query language for typical time series queries [1]. So I'd recommend starting from learning PromQL and then evaluating time series databases from the list above.
* ClickHouse (this is a general-purpose OLAP database, but it is easy to adapt it to time series workloads)
* InfluxDB
* TimescaleDB
* M3DB
* Cortex
* VictoriaMetrics
The last three of these TSDBs support PromQL query language - the most practical query language for typical time series queries [1]. So I'd recommend starting from learning PromQL and then evaluating time series databases from the list above.
[1] https://medium.com/@valyala/promql-tutorial-for-beginners-9a...