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The CSV data source is an open source plugin for Grafana that lets you visualize data from any URL that returns CSV data, such as REST APIs or static file servers. You can even load data from a local file path.

Since the plugin doesn't keep a record of previous queries, each query needs to contain the complete data set you want to visualize. If you'd like to visualize how the data changes over time, you're probably better off storing the data in a database.