Data Source Overview
Grafana supports many different storage backends for your time series data (Data Source). Each Data Source has a specific Query Editor that is customized for the features and capabilities that the particular Data Source exposes.
The query language and capabilities of each Data Source are obviously very different. You can combine data from multiple Data Sources onto a single Dashboard, but each Panel is tied to a specific Data Source that belongs to a particular Organization.
Supported Data Sources
The following datasources are officially supported:
Data source plugins
Since grafana 3.0 you can install data sources as plugins. Checkout Grafana.net for more data sources.