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added toc to sql guide to address PR feedback

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Scott Anderson 2019-07-22 12:30:21 -06:00
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@ -16,9 +16,15 @@ The [Flux](/v2.0/reference/flux) `sql` package provides functions for working wi
like [PostgreSQL](https://www.postgresql.org/) and [MySQL](https://www.mysql.com/)
and use the results with InfluxDB dashboards, tasks, and other operations.
- [Query a SQL data source](#query-a-sql-data-source)
- [Join SQL data with data in InfluxDB](#join-sql-data-with-data-in-influxdb)
- [Use SQL results to populate dashboard variables](#use-sql-results-to-populate-dashboard-variables)
- [Sample sensor data](#sample-sensor-data)
## Query a SQL data source
To query a SQL data source:
1. import the `sql` package in your Flux query
1. Import the `sql` package in your Flux query
2. Use the `sql.from()` function to specify the driver, data source name (DSN),
and query used to query data from your SQL data source: